Overview

27 BC is best known as the year in which Octavian was granted the honorific title Augustus by the Roman Senate, an event conventionally cited as the formal inauguration of the Roman Empire and the Principate. In political terms the year marks a negotiated settlement in which republican institutions were preserved in appearance while Augustus secured unique powers and commands that placed him at the apex of Roman government. The settlement is often called the "First Settlement" in modern scholarship and is treated as the beginning of a long period of imperial rule.

Calendar and dating

Chronology for 27 BC depends on reconstruction of the early Julian calendar. Sources and modern reconstructions differ about which weekday the year began and whether it was treated as a leap year in surviving reckonings. It is variously described as:

These alternatives reflect early misapplication of the Julian leap-year rule and differing interpretations of ancient chronological evidence. The system in question is the Julian calendar, which was the basis for civil dating across the Roman world for many centuries.

Political developments

Augustus’ settlement left formal republican offices intact while giving him extraordinary provincial authority and military command. He controlled the provinces that contained the Roman legions, exercised overriding imperium, and thus held effective control of the armed forces. At the same time magistracies, the Senate, and other civic structures continued to function. This combination of republican forms and concentrated authority became a defining feature of the early empire and shaped administrative practices in the provinces and the army.

Cultural and long-term impact

The events of 27 BC were decisive as a turning point in Roman history even though the transformation was gradual. The era that followed saw strengthened central administration, an emphasis on public building and cultural patronage, and a long interval of relative internal stability often associated with the term Pax Romana. Augustus’ role as patron and his associations with leading poets and statesmen of the generation became central to the Roman political and cultural synthesis.

Further notes

  • The phrase "First Settlement" is used by historians to describe the political compromise reached in this year.
  • Because of calendar irregularities in the early Julian period, precise day-of-week assignments for 27 BC are uncertain; see reconstructions and chronology discussions: reconstruction A, reconstruction B, and chronology notes.
  • For broader context on the calendar reforms and their later correction, consult summaries of the Julian leap-year issue and general introductions to the Julian calendar.