Adventus

Adventus is the Latin word for arrival, and may mean
 * Adventus (ceremony), the ceremony of an emperor's formal arrival at a city (usually, but not always, Rome)
 * Adventus (art), the artistic convention of depicting this ceremony
 * The Latin word for the Christian season of Advent
 * Quintus Antistius Adventus, Roman governor of Britain
 * Adventus Saxonum, the traditional date for the arrival of the Saxons in Britain in 449