Caesar Augustus, also known as Octavian, was the founder of the Roman Empire; he reigned as the first Roman emperor from 27 BC until his death in AD 14. The reign of Augustus initiated an imperial cult as well as an era associated with imperial peace, the Pax Romana or Pax Augusta, in which the Roman world was largely free of armed conflict aside from expansionary wars and the Year of the Four Emperors. The Principate system of imperial rule established by Augustus lasted until the Crisis of the Third Century.
The Tetrarchy was the system instituted by Roman emperor Diocletian in 293 AD to govern the ancient Roman Empire by dividing it between two emperors, the augusti, and their junior colleagues and designated successors, the caesares.
The following outline is provided as an overview of and topical guide to ancient Rome:
The Roman emperor was the ruler and monarchical head of state of the Roman Empire, starting with the granting of the title augustus to Octavian in 27 BC. The term "emperor" is a modern convention, and did not exist as such during the Empire. Often when a given Roman is described as becoming emperor in English, it reflects his taking of the title augustus and later basileus. Another title often used was imperator, originally a military honorific, and caesar, originally a surname. Early emperors also used the title princeps alongside other Republican titles, notably consul and pontifex maximus.
The princeps senatus, in English the leader of the senate, was the first member by precedence on the membership rolls of the Roman Senate. Although officially out of the cursus honorum and possessing no imperium, this office conferred prestige on the senator holding it.
Various lists regarding the political institutions of ancient Rome are presented. Each entry in a list is a link to a separate article. Categories included are: constitutions (5), laws (5), and legislatures (7); state offices (28) and office holders ; political factions and social ranks (8). A political glossary (35) of similar construction follows.
Pater Patriae was an honorific title in ancient Rome. In Latin, it means "father of the country", or more literally, "father of the fatherland".
Caesar is a title of imperial character. It derives from the cognomen of the Roman dictator Julius Caesar. The change from being a surname to a title used by the Roman emperors can be traced to AD 68, following the fall of the Julio-Claudian dynasty. When used on its own, the title denoted heir apparents, which would later adopt the title augustus on accession. The title remained an essential part of the style of the emperors, and became the word for "emperor" in some languages, such as German (kaiser) and Russian (tsar).
In the Roman army during classical antiquity, a centurion, was a commander, nominally of a century, a military unit originally consisting of 100 legionaries. The size of the century changed over time, and from the first century BC through most of the imperial era was reduced to 80 men.
The Principate is the form of imperial government of the Roman Empire from the beginning of the reign of Augustus in 27 BC to the end of the Crisis of the Third Century in AD 284, after which it evolved into the Dominate.
The Dominate, also known as the late Roman Empire, is the despotic form of imperial government of the late Roman Empire. It followed the earlier period known as the Principate. Until the empire was reunited in 313, this phase is more often called the Tetrarchy.
Dominus is the Latin word for master or owner. Dominus saw use as a Roman imperial title. It was also the Latin title of the feudal, superior and mesne, lords, and an ecclesiastical and academic title. The ecclesiastical title was rendered through the French sieure in English as sir, making it a common prefix for parsons before the Reformation, as in Sir Hugh Evans in Shakespeare's Merry Wives of Windsor. Its shortened form Dom remains used as a prefix of honor for ecclesiastics of the Catholic Church, and especially for members of the Benedictine and other religious orders. The title was formerly also used as is, Dominus, for a Bachelor of Arts.
As with most other military forces the Roman military adopted an extensive list of decorations for military gallantry and likewise a range of punishments for military transgressions.
The History of the Roman Constitution is a study of Ancient Rome that traces the progression of Roman political development from the founding of the city of Rome in 753 BC to the collapse of the Western Roman Empire in 476 AD. The constitution of the Roman Kingdom vested the sovereign power in the King of Rome. The king did have two rudimentary checks on his authority, which took the form of a board of elders and a popular assembly. The arrangement was similar to the constitutional arrangements found in contemporary Greek city-states. These Greek constitutional principles probably came to Rome through the Greek colonies of Magna Graecia in southern Italy. The Roman Kingdom was overthrown in 510 BC, according to legend, and in its place the Roman Republic was founded.
The Senate of the Roman Empire was a political institution in the ancient Roman Empire. After the fall of the Roman Republic, the constitutional balance of power shifted from the Roman Senate to the Roman Emperor. Beginning with the first emperor, Augustus, the Emperor and the Senate were technically two co-equal branches of government. In practice, however, the actual authority of the imperial Senate was negligible, as the Emperor held the true power of the state. As such, membership in the senate became sought after by individuals seeking prestige and social standing, rather than actual authority. During the reigns of the first Emperors, legislative, judicial, and electoral powers were all transferred from the "Roman assemblies" to the Senate. However, since the control that the Emperor held over the senate was absolute, the Senate acted as a vehicle through which the Emperor exercised his autocratic powers.
The constitution of the late Roman Empire was an unwritten set of guidelines and principles passed down, mainly through precedent, which defined the manner in which the late Roman Empire was governed. As a matter of historical convention, the late Roman Empire emerged from the Roman Principate, with the accession of Diocletian in AD 284, his reign marking the beginning of the Tetrarchy. The constitution of the Dominate outrightly recognized monarchy as the true source of power, and thus ended the facade of dyarchy, in which emperor and Senate governed the empire together.
The history of the constitution of the Roman Empire begins with the establishment of the Principate in 27 BC and is considered to conclude with the abolition of that constitutional structure in favour of the Dominate at Diocletian's accession in AD 284.
The History of the Constitution of the Late Roman Empire is a study of the ancient Roman Empire that traces the progression of Roman political development from the abolition of the Roman Principate around the year 200 until the fall of the Western Roman Empire in 476 CE. When Diocletian became Roman Emperor in 284 CE, he inherited a constitution that was no longer functioning, and so he enacted the most significant constitutional reforms in over 300 years. His reforms, much like those 300 years before, were intended to correct the errors in the previous constitution. Diocletian's specific reforms were less radical than was the reality that he exposed the state of government for what it had been for centuries: monarchy. With Diocletian's reforms the Principate was abolished, and a new system, the Dominate, was established.
The history of the Roman Empire covers the history of ancient Rome from the fall of the Roman Republic in 27 BC until the abdication of Romulus Augustulus in AD 476 in the West, and the Fall of Constantinople in the East in AD 1453. Ancient Rome became a territorial empire while still a republic, but was then ruled by Roman emperors beginning with Augustus, becoming the Roman Empire following the death of the last republican dictator, the first emperor's adoptive father Julius Caesar.
Augustus was an ancient Roman title given as both name and title to Gaius Julius Caesar Octavianus, Rome's first Emperor. On his death, it became an official title of his successor, and was so used by Roman emperors thereafter. The feminine form Augusta was used for Roman empresses and other female members of the imperial family. The masculine and feminine forms originated in the time of the Roman Republic, in connection with things considered divine or sacred in traditional Roman religion. Their use as titles for major and minor Roman deities of the Empire associated the Imperial system and imperial family with traditional Roman virtues and the divine will, and may be considered a feature of the Roman imperial cult.
