AD 11 — a year of the early Roman Empire

Calendar and naming conventions

The year fell under the Julian calendar, which organized years of 365 days with a leap day every fourth year. AD 11 is described in astronomical and chronological tables as a common year beginning on Thursday, meaning January 1 of that year corresponded to that weekday in Julian reckoning. Romans primarily dated events by magistracies and consular names rather than by a numbered era; hence sources record it as the consulship rather than as "AD 11".

Political and regional context

Within the Roman world this year occurred during the final decades of the principate of Emperor Augustus, a period of centralized imperial authority and ongoing border management. The title preserved in surviving annals—consulship of Lepidus and Taurus—reflects the continuing importance of the consulship as a dating formula and ceremonial office even as real power rested with the emperor. For the larger Eurasian scene, imperial China was under the short-lived Xin regime established a few years earlier, and other regions maintained local dynasties and polities.

• Chronological note: medieval scholars popularized the Anno Domini era later; ancient documents would not have used AD numbering.
• Roman practice: years commonly referenced by consuls, e.g. the consulship of Lepidus and Taurus.
• Calendar detail: a 1st century year in the Julian system.

Surviving evidence for single years this remote is often fragmentary: historians build narratives from annalistic histories, inscriptions, coins and later chroniclers. As a result, AD 11 is best understood as a fixed point in chronological tables that helps organize political, social and cultural developments across regions rather than as a year famous for widely recorded singular events.