was a common year starting on Thursday
(link will display the full calendar) of the Julian calendar
- Tigellinus, minister and favorite of the later Roman emperor Nero, is banished for adultery with Caligula's sisters.
- Domitius Afer secures a consulship.
- Caligula is also a consul.
- Agrippa I, king of Judaea, successfully accuses Herod Antipas, tetrarch of Galilee and Perea, of conspiracy against Caligula. Antipas is exiled and Agrippa receives his territory.
- Legio XV Primigenia and XXII Primigenia are levied by Caligula for the German frontier.
- Caligula's campaign into Germany is stopped by a conspiracy led by Cassius Chaerea.
- Caligula orders that a statue of himself be placed in the temple in Jerusalem. The governor of Syria, Publius Petronius, who is responsible for erecting the statue, faces mass demonstrations by Jews of the region and manages to delay construction of the statue until the death of Caligula (January 24, 41).
- Philo leads a Jewish delegation to Rome to protest the anti-Jewish conditions in Alexandria.