For alternate uses, see Number 31.

Events

• Aelius Sejanus named co-Consul to the Emperor Tiberius
• Naevius Sutorius Macro becomes the leader of the Praetorian Guard after Sejanus is executed.

Births

Deaths

• October 18 - Aelius Sejanus, Roman politician (executed)
• Marcus Velleius Paterculus, Roman historian (possibly executed as an accomplice of Sejanus)
• Livilla, member of the Julio-Claudian family (executed for her role in a plot to overthrow Tiberius with Sejanus)