Roman Empire



{{Infobox Former Country|native_name = Other possibilities are Imperium Romanum and Romania. Res publica, as a term denoting the Roman "commonwealth" in general, can refer to both the Republican and the Imperial era, while imperium Romanum is used to denote the territorial extent of Roman authority. The later term Romania, which was eventually carried over to Byzantine Empire, appears in Greek and Latin sources from the fourth century onward. (See Wolff, R.L. "Romania: The Latin Empire of Constantinople". In: Speculum, 23 (1948), pp. 1-34 (pp. 2-3).)|conventional_long_name = Roman Empire|common_name = Roman Empire|national_motto = Senatus Populusque Romanus (SPQR)], 1453 proclaimed princeps|event_end = [Fall of Constantinople by the Ottoman Empire|event1 = Battle of Actium, [31 BC proclaimed [Augustus (honorific)|date_event2 = 16 January, 27 BC splits imperial administration between east and west|date_event3 = [285 declares [Constantinople new imperial capital]|event5 = Visigoths Sack of Rome, capital moved to Ravenna|event6 = [Romulus Augustus deposed by Odoacer|p1 = Roman Republic|flag_p1 =|s1 = Byzantine Empire|flag_s1 = Flag of Palaeologus Emperor.svg|s2 = [Western Roman Empire|s4 = [Visigoths|s5 = Burgundians#The Burgundian Kingdoms|s6 = Vandals|s7 = Suebi#Suebi kingdom in Gallaecia|s8 = Domain of Soissons|s10 = [Frankish Empire([44 BC-286)Milan(286-402)Trier(295-395) Ravenna(402-476)Nicomedia(286-330)Constantinople(From 330) Sirmium(293-379)

] (imperial), Greek language (administrative)|religion = Religion in ancient Rome, later Christianity, [Aureus, Denarius, Sestertius, As (coin)|leader1 = Augustus|leader2 = Romulus Augustus|year_leader1 = 27 BC-AD 14|year_leader2 = 475-476|title_leader = Roman Emperor|title_representative = Roman consul|representative1 = Augustus|representative2 = Basiliscus|year_representative1 = 27 BC-23 BC|year_representative2 = 476|legislature = Roman SenateJohn D. Durand, Historical Estimates of World Population: An Evaluation, 1977, pp. 253-296.|stat_area1 = 2750000|stat_year2 = [50|stat_area3 = 5000000|stat_pop3 = 88000000|stat_year4 = [390 ] domain developed by the city-state of Rome and also the corresponding phase of that civilization, characterized by an autocratic form of government. This article however is about the latter. The Roman Empire succeeded the 500 year-old Roman Republic (510 BC - 1st century BC), which had been weakened by the conflict between Gaius Marius and Sulla and the civil war of Julius Caesar against Pompey the Great. During these struggles hundreds of senators were killed or died, and the Roman Senate had been refilled with loyalists of the First Triumvirate and later those of the Second Triumvirate. Several dates are commonly proposed to mark the transition from Republic to Empire, including the date of Julius Caesar's appointment as perpetual roman dictator (44 BC), the victory of Caesar's heir Augustus at the Battle of Actium (September 2, 31 BC), and the Roman Senate's granting to Octavian the honorific Augustus (honorific). (January 16, 27 BC).Octavian/Augustus officially proclaimed that he had saved the Roman Republic and carefully disguised his power under republican forms; consuls continued to be elected, tribunes of the plebeians continued to offer legislation, and senators still debated in the curia. However, it was Octavian, and every effective emperor thereafter, who influenced everything and controlled the final decisions, and in final analysis, had the Roman legions to back him up, if it ever became necessary.

The Latin (language) term Imperium#Territories (Roman Empire), probably the best-known Latin expression where the word "imperium" denotes a territory, indicates the part of the world under Roman rule. From the time of Augustus to the Decline of the Roman Empire, Rome's dominion covered all of the following: England and Wales; most of History of West Eurasia (west of the Rhine and south of the Alps); coastal Maghreb, together with the adjacent province of Ægyptus; the Balkans, the Black Sea, and Anatolia; and also much of the Levant. Hence the Imperium#Territories subsumed, west-to-east, modern day Portugal, Spain, England and France, Italy, Albania and Greece, the Balkans, and Turkey; southward it embraced parts of the Middle East: present day Syria, Lebanon, and more; thence southwestward it included the whole of ancient Egypt, then swept westward to contain the coastal regions of what are today Libya, Tunisia, Algeria, and Morocco, out to the longitudes just west of Gibraltar. Most of the people living there called themselves Romans, and lived under Roman law. Roman expansion began long before the state was changed into a monarchy and reached its zenith under Emperor Trajan with the conquest of Dacia (i.e., modern Romania and Moldova, as well as parts of Hungary, Bulgaria and Ukraine), in AD 106, and Mesopotamia in 116 (subsequently returned by Hadrian). At this territorial peak, the Roman Empire controlled approximately 5 900 000 km² (2,300,000 sq.mi.) of land surface, and so encompassed the Mediterranean Sea that the Romans called it "mare nostrum" - Latin for "our sea". Rome's influence upon the culture, law, technology, arts, language, religion, government, military, and architecture of the Western Civilization that arose from this ancient ancestor continues to this day.

The end of the Roman Empire is sometimes placed at 4 September AD 476, when the last emperor of the Western Roman Empire, Romulus Augustus, was deposed, and not replaced. However, Diocletian, who retired in AD 305, was the last sole Emperor of an undivided Empire whose capital was the City of Rome. After the division of the Empire by Diocletian into East and West, each branch continued to style itself as "The Roman Empire." The Western Roman Empire declined and fell apart (see Decline of the Roman Empire) in the course of the 5th century. The Eastern Roman Empire, centered on Constantinople (founded by Constantine I on the Greek city of Byzantion), which would later adopt Greek language as its main language, known widely today as the Byzantine Empire, preserved Greco-Roman legal and cultural traditions along with Hellenic and Eastern Orthodox Church elements for another millennium, until its eventual collapse with the conquest of Constantinople, as Constantine's city become known, at the hands of the Ottomans in 1453.

Evolution of Imperial Rome Traditionally, historians make a distinction between the Principate, the period following Augustus until the Crisis of the Third Century, and the Dominate, the period from Diocletian until the end of the empire in the west. According to this distinction, during the Principate (from the Latin word princeps, meaning "first citizen") the realities of absolutism were formally concealed behind republican forms; while during the Dominate (from the word dominus, meaning "master or owner") imperial power was clearly shown, with golden crowns and ornate imperial ritual. More recently, historians have established that the situation was far more nuanced: certain historical forms continued until the Byzantine period, more than one thousand years after they were created, and displays of imperial majesty were common from the earliest days of the Empire.

First emperor (dark red), 133 BC (light red), 44 BC (orange), 14 (yellow), after AD 14 (green), and maximum extension under Trajan 117 (light green).

No definitive answer exists regarding the identity of the first emperor of Rome. Under a purely technical point of view there is no clear first emperor, as the title itself was not an official post in the Roman constitutional system—rather, it was an amalgam of separate roles.

Julius Caesar was a Dictator Perpetuus (Roman dictator for life), which was a highly irregular form of dictator, an official position in the Roman republic. By law, the rule of a dictator would normally never exceed 6 months. The form created by Caesar was therefore quite contrary to the basic principles of the Roman Republic. Nevertheless, officially his authority rested upon this republican title, however irregular it might have been, and therefore he is considered a republican official. At the very least, he pretended to be one. Several senators, among them many former enemies who had been "graciously" pardoned by him, grew fearful that he would crown himself and try to establish a monarchy. Accordingly, they conspired to assassinate him, and on the Ides of March, 44 BC, the life-long dictator perished under the blades of his assassins.

Augustus, his grand-nephew, adopted son and political heir, learned from the mistake of his predecessor and never claimed the widely feared title dictator, disguising his power under republican forms much more carefully. All this was intended to foster the illusion of a restoration of the Republic. He received several titles like Augustus (honorific)—the elevated one, and Princeps—translated as first citizen of the Roman republic or as first leader of the Roman Senate. The latter had been a title awarded for those who had served the state well; Pompey had held that title.

In addition, Augustus (as he was named thereafter) was granted the right to wear the Civic Crown of laurel and oak. However, it must be noted that officially, none of these titles or the Civic Crown, granted Augustus any additional powers or authority; officially, he was simply a highly-honored Roman citizen, holding the consulship. Augustus also became Pontifex Maximus after the death of Marcus Aemilius Lepidus (49 BC) in 13 BC. He also received several additional and extraordinary powers without claiming too many titles. In the end, he only needed the authority itself, not all the titles.

From the Republic to the Principate: Augustus (27 BC–AD 14) , the first emperor of the Roman Empire

The Battle of Actium resulted in the defeat and subsequent suicides of Mark Antony and Cleopatra VII of Egypt. Octavian had also executed Cleopatra's young son and co-ruler, Caesarion. Caesarion may have been the (only) son of Julius Caesar. Therefore, by killing Caesarion, Octavian removed any possibility of a male rival emerging with closer blood ties to Julius Caesar. Octavian, now sole ruler of Rome, began a full-scale reformation of military, fiscal and political matters. These were intended to stabilize and pacify the Roman world and also to cement acceptance of the new regime.

Upon Octavian's accession as ruler of the Roman world, the Roman Senate gave Octavian the name "Augustus." He had already adopted the title "imperator," commander-in-chief, as his praenomen. It was a term that dated back to the days of the Republic and later evolved into "emperor."

As adopted heir of Caesar, Augustus preferred to be called by this name. "Caesar" was a component of his family name. Julio-Claudian rule lasted for almost a century (from Julius Caesar in the mid 1st century BC to the emperor Nero in the mid 1st century AD). By the time of the Flavian Dynasty, and the reign of Vespasian, and that of his two sons, Titus and Domitian, the term "Caesar" had evolved, almost de facto, from a family name into a formal title. Derivatives of this title (such as czar and kaiser) endure to this day.

The Roman legions, which had reached an unprecedented number (around fifty) because of the civil wars, were reduced to twenty-eight. Several legions, particularly those with members of doubtful loyalties, were simply disbanded. Other legions were amalgamated, a fact hinted by the title Gemina (Twin). Augustus also created nine special Cohort (military unit), ostensibly to maintain the peace in Italy, keeping at least three of them stationed at Rome. These cohorts became known as the Praetorian Guard.

Octavian realized that autocracy and kingship were things that Romans had not experienced for centuries, and were wary of. Octavian did not want to be viewed as a tyrant and sought to retain the illusion of the constitutional republic. He attempted to make it seem as though the constitution of the Roman Republic was still functional. Even Rome's past dictators, such as the brutal Lucius Cornelius Sulla, had only ruled Rome for short spans of time, never more than a year or two (with the exception of Julius Caesar). In 27 BC, Octavian officially tried to relinquish all his extraordinary powers to the Roman Senate. In a carefully staged way, the senators, who by this time were mostly his partisans, refused and begged him to keep them for the sake of the republic and the people of Rome. Reportedly, the suggestion of Octavian stepping down as consul led to rioting amongst the Plebeians in Rome. A compromise was reached between the Senate and Octavian, known as the First Settlement. This agreement gave Augustus legitimacy as an autocrat of the people, and ensured that he would not be considered a tyrant, starting the long period that would be known as Pax Romana.

Octavian split with the Senate the governorships of the provinces. The unruly provinces at the borders, where the vast majority of the legions were stationed, were administrated by imperial legates, chosen by the emperor himself. These provinces were classified as imperial provinces. The governors of the peaceful senatorial provinces were chosen by the Senate. These provinces were usually peaceful and only a single legion was stationed in the senatorial province of Africa (province).



Before the Senate controlled the treasury, Augustus had mandated that the taxes of the Imperial provinces were destined to the Fiscus, which was administrated by persons chosen by, and answerable only to, Augustus. The revenue of the senatorial provinces continued to be sent to the Aerarium, under the supervision of the Senate. This effectively made Augustus richer than the Senate, and more than able to pay the salarium (salary) of the Legionary, ensuring their continued loyalty. This was ensured by the Imperial province of Aegyptus (Roman province), which was incredibly wealthy and also the most important grain supplier for the whole empire. Senators were forbidden to even visit this province, as it was largely considered the personal fiefdom of the emperor himself.

according to the Periplus of the Erythraean Sea, 1st century AD.Augustus renounced his consulship in 23 BC, but retained his consular imperium, leading to a second compromise between Augustus and the Senate known as the Second Settlement. Augustus was granted the authority of a tribune (tribunicia potestas), though not the title, which allowed him to convene the Senate and people at will and lay business before it, veto the actions of either the Assembly or the Senate, preside over elections, and gave him the right to speak first at any meeting. Also included in Augustus's tribunician authority were powers usually reserved for the Roman censor; these included the right to supervise public morals and scrutinize laws to ensure they were in the public interest, as well as the ability to hold a census and determine the membership of the Senate. No tribune of Rome ever had these powers, and there was no precedent within the Roman system for consolidating the powers of the tribune and the censor into a single position, nor was Augustus ever elected to the office of Censor. Whether censorial powers were granted to Augustus as part of his tribunician authority, or he simply assumed these responsibilities, is still a matter of debate.

In addition to tribunician authority, Augustus was granted sole imperium within the city of Rome itself; all armed forces in the city, formerly under the control of the praefects, were now under the sole authority of Augustus. Additionally, Augustus was granted imperium proconsulare maius (power over all proconsuls), the right to interfere in any province and override the decisions of any governor. With maius imperium, Augustus was the only individual able to grant a Roman triumph to a successful general as he was ostensibly the leader of the entire Roman army.

.

All of these reforms were highly unusual in the eyes of Roman republican tradition, but the Senate was no longer composed of the republican patricians who had the courage to murder Caesar. Most of these senators had died in the Civil Wars, and the leaders of the conservative Republicans in the senate, such as Cato the Younger and Cicero, had long since died. Octavian had purged the Senate of any remaining suspect elements and planted the body with his own partisans. How free a hand the Senate had in all these transactions, and what backroom deals were made, remains unknown.

Attempting to secure the borders of the empire upon the rivers Danube and Elbe, Octavian ordered the invasions of Illyricum (Roman province), Moesia, and Pannonia (south of the Danube), and Germania (west of the Elbe). At first everything went as planned, but then disaster struck. The Illyrian tribes revolted and had to be crushed, and three full legions under the command of Publius Quinctilius Varus were ambushed and destroyed at the Battle of the Teutoburg Forest in 9 by German barbarians under the leadership of Arminius. Being cautious, Augustus secured all territories west of Rhine and contented himself with retaliatory raids. The rivers Rhine and Danube became the permanent borders of the Roman empire in the North.

Sources The age of Augustus is far more poorly documented than the late Republican period that preceded it. While Livy wrote his magisterial history during Augustus's reign and his work covered all of Roman history through 9 BC, only epitomes survive of his coverage of the late Republican and Augustan periods. Important primary sources for this period include:

Though primary accounts of this period are few, works of poetry, legislation and engineering from this period provide important insights into Roman life. Archaeology, including maritime archaeology, aerial surveys, Epigraphy inscriptions on buildings, and Augustan Roman currency, has also provided valuable evidence about economic, social and military conditions.

Secondary sources on the Augustan Age include Tacitus, Dio Cassius, Plutarch and Lives of the Twelve Caesars by Suetonius. Josephus's Jewish Antiquities is the important source for Judea in this period, which became a Roman province during Augustus's reign.

Julio-Claudian Dynasty (14–68) Augustus had three grandsons by his daughter Julia. None of the three lived long enough to succeed him. He therefore was succeeded by his stepson Tiberius, the son of his wife Livia from her first marriage. Augustus was a scion of the gens Julius (the Julian family), one of the most ancient patrician clans of ancient Rome, while Tiberius was a scion of the gens Claudius (gens), only slightly less ancient than the Julians. Their three immediate successors were all descended both from the gens Claudia, through Tiberius's brother Nero Claudius Drusus, and from gens Julia, either through Julia the Elder, Augustus's daughter from his first marriage (Caligula and Nero), or through Augustus's sister Octavia Minor (Claudius). Historians thus refer to their dynasty as "Julio-Claudian".

Tiberius (14–37) The early years of Tiberius's reign were peaceful and relatively benign. Tiberius secured the overall power of Rome and enriched its treasury. However, Tiberius's reign soon became characterized by paranoia and slander. In 19, he was widely blamed for the death of his nephew, the popular Germanicus. In 23 his own son Drusus died. More and more, Tiberius retreated into himself. He began a series of treason trials and executions. He left power in the hands of the commander of the guard, Sejanus. Tiberius himself retired to live at his villa on the island of Capri in 26, leaving administration in the hands of Sejanus, who carried on the persecutions with relish. Sejanus also began to consolidate his own power; in 31 he was named co-consul with Tiberius and married Livilla, the emperor's niece. At this point he was "hoisted by his own petard": the emperor's paranoia, which he had so ably exploited for his own gain, was turned against him. Sejanus was put to death, along with many of his associates, the same year. The persecutions continued until Tiberius's death in 37.

Caligula (37–41) At the time of Tiberius's death most of the people who might have succeeded him had been brutally murdered. The logical successor (and Tiberius's own choice) was his grandnephew, Germanicus's son Gaius (better known as Caligula or "little boots"). Caligula started out well, by putting an end to the persecutions and burning his uncle's records. Unfortunately, he quickly lapsed into illness. The Caligula that emerged in late 37 demonstrated features of mental instability that led modern commentators to diagnose him with such illnesses as encephalitis, which can cause mental derangement, hyperthyroidism, or even a nervous breakdown (perhaps brought on by the stress of his position). Whatever the cause, there was an obvious shift in his reign from this point on, leading his biographers to think he was insane.

Most of what history remembers of Caligula comes from Seutonius, in his book "Lives of the Twelve Caesars." According to Seutonius, Caligula once planned to appoint his favorite horse Incitatus to the Roman Senate. He ordered his soldiers to invade Iron Age Britain to fight the Sea God Neptune (mythology), but changed his mind at the last minute and had them pick sea shells on the northern end of France instead. It is believed he carried on incestuous relations with his sisters. He ordered a statue of himself to be erected in the Temple at Jerusalem, which would have undoubtedly led to revolt had he not been dissuaded from this plan by his friend king Agrippa I. He ordered people to be secretly killed, and then called them to his palace. When they did not appear, he would jokingly remark that they must have committed suicide. In 41, Caligula was assassinated by the commander of the guard Cassius Chaerea. The only member of the imperial family left to take charge was his uncle, Tiberius Claudius Drusus Nero Germanicus.

Claudius (41–54) Claudius had long been considered a weakling and a fool by the rest of his family. He was, however, neither Paranoia like his uncle Tiberius, nor insane like his nephew Caligula, and was therefore able to administer the empire with reasonable ability. He improved the bureaucracy and streamlined the citizenship and senatorial rolls. He also proceeded with the Roman invasion of Britain (in 43), and incorporated more Eastern provinces into the empire. He ordered the construction of a winter port for Rome, at Ostia, thereby providing a place for Rome's grain supply from other parts of the Empire to be brought in inclement weather.

In his own family life, Claudius was less successful. His wife Messalina cuckolded him; when he found out, he had her executed and married his niece, Agrippina the Younger. She, along with several of his freedmen, held an inordinate amount of power over him, and although there are conflicting accounts about his death, she may very well have poisoned him in 54. Claudius was deified later that year. The death of Claudius paved the way for Agrippina's own son, the 17-year-old Lucius Domitius Nero.

Nero (54–68) Nero ruled from 54 to 68. During his rule, Nero focused much of his attention on diplomacy, trade, and increasing the cultural capital of the empire. He ordered the building of theatres and promoted athletic games. His reign included a successful war and negotiated peace with the Parthian Empire (58–63), the suppression of the British revolt (60–61) and improving cultural ties with Greece. Nero, though, is remembered as a tyrant and the emperor who "fiddled while Rome burned" in 64. A military coup drove Nero into hiding. Facing execution at the hands of the Roman Senate, he reportedly committed suicide in 68. His last words were "What an artist dies in me."

Rebellions In peacetime it was relatively easy to manage the empire from its capital city, Rome. Rebellions were expected to occur from time to time: a general or a governor would gain the loyalty of his officers through a mixture of personal charisma, promises and simple bribes. A conquered tribe would rebel, or a conquered city would revolt. This would be a bad, but not a catastrophic, event. The Roman legions were spread around the borders, and the rebel leader would - in normal circumstances - have only one or two legions under his command. Loyal legions would be detached from other points of the empire, and would eventually drown the rebellion in blood. This happened even more easily in cases of a small local native uprising, as the rebels would normally have no great military experience. Unless the emperor was weak, incompetent, hated, and/or universally despised, these rebellions would be a local and isolated event.

During real wartime however, which could develop from a rebellion or an uprising, like the massive Jewish rebellion, this was totally and dangerously different. In a full-blown military campaign, the legions under the command of the generals like Vespasian were of a much greater number. Therefore a paranoid or wise emperor would hold some members of the general's family as hostages, to make certain of the latter's loyalty. In effect, Nero held Domitian and Quintus Petillius Cerialis the governor of Ostia Antica (archaeological site), who were respectively the younger son and the brother-in-law of Vespasian. In normal circumstances this would be quite enough. In fact, the rule of Nero ended with the revolt of the Praetorian Guard who had been bribed in the name of Galba. It became all too obvious that the Praetorian Guard was a sword of Damocles, whose loyalty was all too often bought and who became increasingly greedy. Following their example the legions at the borders would also increasingly participate in the civil wars. This was a dangerous development as this would weaken the whole Roman Army.

The main enemy in the West were, arguably, the "barbarian tribes" beyond the Rhine and the Danube. Augustus had tried to conquer them, but ultimately failed and these "barbarians" were greatly feared. But by and large they were left in peace, in order to fight amongst themselves, and were simply too divided to pose a serious threat.

, the arch-rival of Rome, at its greatest extent (c. 60 BC), superimposed over modern borders.

In the East lay the empire of Parthia (Persia). Crassus, a member of the First Triumvirate during the late republic, attempted an invasion in 53 BC, but was defeated by Persian Empire forces led by Surena in the Battle of Carrhae. Any Parthian invasion was confronted and usually defeated, but the threat itself was ultimately impossible to destroy. Parthia would eventually become Rome's greatest rival and foremost enemy.

In the case of a Roman civil war these two enemies would seize the opportunity to invade Roman territory in order to raid and plunder. The two respective military frontiers became a matter of major political importance because of the high number of legions stationed there. All too often the local generals would rebel, starting a new civil war. To control the western border from Rome was easy, as it was relatively close. To control both frontiers, at the same time, during wartime, was somewhat more difficult. If the emperor was near the border in the East, chances were high that an ambitious general would rebel in the West and List of Latin phrases (P–Z). It was no longer enough to be a good administrator; emperors were increasingly near the troops in order to control them and no single Emperor could be at the two frontiers at the same time. This problem would plague the ruling emperors time and time again and many future emperors would follow this path to power.

Year of the Four Emperors (68–69) The forced suicide of emperor Nero, in 68, was followed by a brief period of civil war (the first Roman Republican civil wars since Mark Antony's death in 31 BC) known as the year of the four emperors. Between June of 68 and December of 69, Ancient Rome witnessed the successive rise and fall of Galba, Otho and Vitellius until the final accession of Vespasian, first ruler of the Flavian dynasty. This period of civil war has become emblematic of the cyclic political disturbances in the history of the Roman Empire. The military and political anarchy created by this civil war had serious implications, such as the outbreak of the Batavian rebellion.

Flavian (69–96) The Flavians, although a relatively short-lived dynasty, helped restore stability to an empire on its knees. Although all three have been criticized, especially based on their more centralized style of rule, they issued reforms that created a stable enough empire to last well into the 3rd century. However, their background as a military dynasty led to further marginalization of the senate, and a conclusive move away from princeps, or first citizen, and toward imperator, or emperor.

Vespasian (69–79) Vespasian was a remarkably successful Roman general who had been given rule over much of the eastern part of the Roman Empire. He had supported the imperial claims of Galba, after whose death Vespasian became a major contender for the throne. Following the suicide of Otho, Vespasian was able to take control of Rome's grain supply in Egypt, placing him in a good position to defeat his remaining rival, Vitellius. On December 20, 69, some of Vespasian's partisans were able to occupy Rome. Vitellius was murdered by his own troops and, the next day, Vespasian, then sixty years old, was confirmed as Emperor by the Senate.

Although Vespasian was considered an autocracy by the senate, he mostly continued the weakening of that body that had been going since the reign of Tiberius. The degree of the Senate's subservience can be seen from the post-dating of his accession to power, by the Senate, to July 1, when his troops proclaimed him emperor, instead of December 21, when the Senate confirmed his appointment. Another example was his assumption of the censorship in 73, giving him power over the make up the Senate. He used that power to expel dissident senators. At the same time, he increased the number of senators from 200, at that low level because of the actions of Nero and the year of crisis that followed, to 1000; most of the new senators coming not from Rome but from Italy and the urban centers within the western provinces.

Vespasian was able to liberate Rome from the financial burdens placed upon it by Nero's excesses and the civil wars. To do this, he not only increased taxes, but created new forms of taxation. Also, through his power as censor, he was able to carefully examine the fiscal status of every city and province, many paying taxes based upon information and structures more than a century old. Through this sound fiscal policy, he was able to build up a surplus in the treasury and embark on public works projects. It was he who first commissioned the Amphitheatrum Flavium (Colosseum); he also built a Roman forum whose centerpiece was a temple to Peace. In addition, he allotted sizable subsidies to the arts, creating a chair of rhetoric at Rome.

Vespasian was also an effective emperor for the provinces in his decades of office, having posts all across the empire, both east and west. In the west he gave considerable favoritism to Hispania (the Iberian Peninsula, comprising modern Spain and Portugal) in which he granted Latin Rights to over three hundred towns and cities, promoting a new era of urbanization throughout the western (formerly barbarian) provinces. Through the additions he made to the Senate he allowed greater influence of the provinces in the Senate, helping to promote unity in the empire. He also extended the borders of the empire on every front, most of which was done to help strengthen the frontier defenses, one of Vespasian's main goals. The crisis of 69 had wrought havoc on the army. One of the most marked problems had been the support lent by provincial legions to men who supposedly represented the best will of their province. This was mostly caused by the placement of native auxiliary units in the areas they were recruited in, a practice Vespasian stopped. He mixed auxiliary units with men from other areas of the empire or moved the units away from where they were recruited to help stop this. Also, to reduce further the chances of another military coup, he broke up the legions and, instead of placing them in singular concentrations, broke them up along the border. Perhaps the most important military reform he undertook was the extension of legion recruitment from exclusively Italy to Gaul and Hispania, in line with the Romanization of those areas.

Titus (79–81) Titus, the eldest son of Vespasian, had been groomed to rule. He had served as an effective general under his father, helping to secure the east and eventually taking over the command of Roman armies in Syria (Roman province) and Iudaea (Roman province), quelling the significant Jewish revolt going on at the time. He shared the consul for several years with his father and received the best tutelage. Although there was some trepidation when he took office because of his known dealings with some of the less respectable elements of Roman society, he quickly proved his merit, even recalling many exiled by his father as a show of good faith.

However, his short reign was marked by disaster: in 79, Mount Vesuvius erupted in Pompeii, and in 80, a fire destroyed much of Rome. His generosity in rebuilding after these tragedies made him very popular. Titus was very proud of his work on the vast amphitheater begun by his father. He held the opening ceremonies in the still unfinished edifice during the year 80, celebrating with a lavish show that featured 100 gladiators and lasted 100 days. Titus died in 81, at the age of 41 of what is presumed to be illness; it was rumored that his brother Domitian murdered him in order to become his successor, although these claims have little merit. Whatever the case, he was greatly mourned and missed.

Domitian (81–96) All of the Flavians had rather poor relations with the Senate, because of their autocratic rule, however Domitian was the only one who encountered significant problems. His continuous control as consul and censor throughout his rule; the former his father having shared in much the same way as his Julio-Claudian forerunners, the latter presenting difficulty even to obtain, were unheard of. In addition, he often appeared in full military regalia as an imperator, an affront to the idea of what the Principate-era emperor's power was based upon: the emperor as the princeps. His reputation in the Senate aside, he kept the people of Rome happy through various measures, including donations to every resident of Rome, wild spectacles in the newly finished Colosseum, and continuing the public works projects of his father and brother. He also apparently had the good fiscal sense of his father, because although he spent lavishly his successors came to power with a well-endowed treasury.

However, towards the end of his reign Domitian became extremely paranoid, which probably had its initial roots in the treatment he received by his father: although given significant responsibility, he was never trusted with anything important without supervision. This flowered into the severe and perhaps pathological repercussions following the short-lived rebellion in 89 of Antonius Saturninus, a governor and commander in Germany. Domitian's paranoia led to a large number of arrests, executions, and seizure of property (which might help explain his ability to spend so lavishly). Eventually it got to the point where even his closest advisers and family members lived in fear, leading them to his murder in 96 orchestrated by his enemies in the Senate, Stephanus (the steward of the deceased Julia Flavia), members of the Praetorian Guard and empress Domitia Longina.

Antonine Dynasty (96–180) , AD 117

The next century came to be known as the period of the "Five Good Emperors", in which the succession was peaceful though not dynasty and the Empire was prosperous. The emperors of this period were Nerva (96–98), Trajan (98–117), Hadrian (117–138), Antoninus Pius (138–161) and Marcus Aurelius (161–180), each being adopted by his predecessor as his successor during the former's lifetime. While their respective choices of successor were based upon the merits of the individual men they selected, it has been argued that the real reason for the lasting success of the adoptive scheme of succession lay more with the fact that none but the last had a natural heir.

Nerva (96–98) After his accession, Nerva set a new tone: he released those imprisoned for treason, banned future prosecutions for treason, restored much confiscated property, and involved the Roman Senate in his rule. He probably did so as a means to remain relatively popular (and therefore alive), but this did not completely aid him. Support for Domitian in the army remained strong, and in October 97 the Praetorian Guard laid siege to the Imperial Palace on the Palatine Hill and took Nerva hostage. He was forced to submit to their demands, agreeing to hand over those responsible for Domitian's death and even giving a speech thanking the rebellious Praetorians. Nerva then adopted Trajan, a commander of the armies on the German frontier, as his successor shortly thereafter in order to bolster his own rule. Casperius Aelianus, the Guard Prefect responsible for the mutiny against Nerva, was later executed under Trajan.

Trajan (98–117) In 112, provoked by Parthia's decision to put an unacceptable king on the throne of Armenia, a kingdom over which the two great empires had shared hegemony since the time of Nero some fifty years earlier, Trajan marched first on Armenia. He deposed the king and annexed it to the Roman Empire. Then he turned south into Parthia itself, taking the cities of Babylon, Seleucia and finally the capital of Ctesiphon in 116. He continued southward to the Persian Gulf, whence he declared Mesopotamia a new province of the empire and lamented that he was too old to follow in the steps of Alexander the Great. But he did not stop there. Later in 116, he captured the great city of Susa. He deposed the Parthian King Osroes I and put his own puppet ruler Parthamaspates on the throne. Never again would the Roman Empire advance so far to the east.

Hadrian (117–138) Despite his own excellence as a military administrator, Hadrian's reign was marked by a general lack of major military conflicts but to defend the vast territories the empire had. He surrendered Trajan's conquests in Mesopotamia, considering them to be indefensible. There was almost a war with Parthia around 121, but the threat was averted when Hadrian succeeded in negotiating a peace. Hadrian's army crushed a massive Bar Kokhba revolt in Judea (132–135) led by Simon Bar Kokhba.

Hadrian was the first emperor to extensively tour the provinces, donating money for local construction projects as he went. In Britain, he ordered the construction of a wall, the famous Hadrian's Wall as well as various other such defenses in Germany and Northern Africa. His domestic policy was one of relative peace and prosperity.

Antoninus Pius (138–161) His reign was comparatively peaceful; there were several military disturbances throughout the Empire in his time, in Mauretania, Judaea, and amongst the Brigantes in Britain, but none of them are considered serious. The unrest in Britain is believed to have led to the construction of the Antonine Wall from the Firth of Forth to the Firth of Clyde, although it was soon abandoned.

Marcus Aurelius (161–180)

Germanic tribes and other people launched many raids along the long north European border, particularly into Gaul and across the Danube — Germans, in turn, may have been under attack from more warlike tribes farther east. His campaigns against them are commemorated on the Column of Marcus Aurelius. In Asia, a revitalized Parthian Empire renewed its assault. Marcus Aurelius sent his joint emperor Verus to command the legions in the East to face it. He was authoritative enough to command the full loyalty of the troops, but already powerful enough that he had little incentive to overthrow Marcus. The plan succeeded — Verus remained loyal until his death on campaign in 169.

Commodus (180–192) The period of the "Five Good Emperors" was brought to an end by the reign of Commodus from 180 to 192. Commodus was the son of Marcus Aurelius, making him the first direct successor in a century, breaking the scheme of adoptive successors that had turned out so well. He was co-emperor with his father from 177. When he became sole emperor upon the death of his father in 180, it was at first seen as a hopeful sign by the people of the Roman Empire. Nevertheless, as generous and magnanimous as his father was, Commodus turned out to be just the opposite. In The Decline and Fall of the Roman Empire by Edward Gibbon, it is noted that Commodus at first ruled the empire well. However, after an assassination attempt, involving a conspiracy by certain members of his family, Commodus became paranoid and slipped into insanity. The Pax Romana, or "Roman Peace", ended with the reign of Commodus. One could argue that the assassination attempt began the long decline of the Roman Empire.

Severan Dynasty (193–235)

The Severan Dynasty includes the increasingly troubled reigns of Septimius Severus (193–211), Caracalla (211–217), Macrinus (217–218), Elagabalus (218–222), and Alexander Severus (222–235). The founder of the dynasty, Lucius Septimius Severus, belonged to a leading native family of Leptis Magna in Africa who allied himself with a prominent Syrian family by his marriage to Julia Domna. Their provincial background and cosmopolitan alliance, eventually giving rise to imperial rulers of Syrian background, Elagabalus and Alexander Severus, testifies to the broad political franchise and economic development of the Roman empire that had been achieved under the Antonines. A generally successful ruler, Septimius Severus cultivated the Roman army support with substantial remuneration in return for total loyalty to the emperor and substituted equestrian officers for senators in key administrative positions. In this way, he successfully broadened the power base of the imperial administration throughout the empire, also by abolishing the regular standing jury courts of Roman Republic times.

Septimius Severus's son, Marcus Aurelius Antoninus — nicknamed Caracalla — removed all legal and political distinction between Italians and provincials, enacting the Constitutio Antoniniana in 212 which extended full Roman citizenship to all free inhabitants of the empire. Caracalla was also responsible for erecting the famous Baths of Caracalla in Rome, their design serving as an architectural model for many subsequent monumental public buildings. Increasingly unstable and autocratic, Caracalla was assassinated by the Praetorian Guard Macrinus in 217, who succeeded him briefly as the first emperor not of senatorial rank. The imperial court, however, was dominated by formidable women who arranged the succession of Elagabalus in 218, and Alexander Severus, the last of the dynasty, in 222. In the last phase of the Severan principate, the power of the Senate was somewhat revived and a number of fiscal reforms were enacted. Despite early successes against the Sassanian Empire in the East, Alexander Severus's increasing inability to control the army led eventually to its mutiny and his assassination in 235. The death of Alexander Severus ushered in a subsequent period of soldier-emperors and almost a half-century of civil war and strife. The pax Romana started at the death of Octavian and ended about 2 hundred years later.

Crisis of the Third Century (235–284) The Crisis of the Third Century is a commonly applied name for the crumbling and near collapse of the Roman Empire between 235 and 284. It is also called the period of the "military anarchy."

After Augustus declared an end to the Civil Wars of the 1st century BC, the Empire had enjoyed a period of limited external invasion, internal peace and economic prosperity (the Pax Romana). In the 3rd century, however, the Empire underwent military, political and economic crises and began to collapse. There was constant barbarian invasion, civil war, and runaway hyperinflation. Part of the problem had its origins in the nature of the Augustan settlement. Augustus, intending to downplay his position, had not established rules for the succession of emperors. Already in the 1st and 2nd century disputes about the succession had led to short civil wars, but in the 3rd century these civil wars became a constant factor, as no single candidate succeeded in quickly overcoming his opponents or holding on to the Imperial position for very long. Between 235 and 284 no fewer than 25 different emperors ruled Rome (the Soldier-Emperors). All but two of these emperors were either murdered or killed in battle. The organization of the Roman military, concentrated on the borders, could provide no remedy against foreign invasions once the invaders had broken through. A decline in citizens' participation in local administration forced the Emperors to step in, gradually increasing the central government's responsibility.

This period ended with the accession of Diocletian. Diocletian, either by skill or sheer luck, solved many of the acute problems experienced during this crisis. However, the core problems would remain and cause the eventual destruction of the western empire. The transitions of this period mark the beginnings of Late Antiquity and the end of Cl