Dear Wikiwand AI, let's keep it short, summarize this topic like I'm... Ten years old or a College student
The Fasti Ostienses are a calendar of Roman magistrates and significant events from 49 BC to AD 175, found at Ostia, the principal seaport of Rome. Together with similar inscriptions, such as the Fasti Capitolini and Fasti Triumphales at Rome, the Fasti Ostienses form part of a chronology known as the Fasti Consulares, or Consular Fasti.
The Fasti Ostienses were originally engraved on marble slabs in a public place, either the Ostian forums, or the temple of Vulcan, the tutelary deity of Ostia. The fasti were later dismantled and used as building materials. Since their rediscovery, they have become one of the primary sources for the chronology of the early Roman Empire, along with historians such as Tacitus, Suetonius, and Cassius Dio.