31

Year 31 was a (link will display the full calendar) of the.

Roman Empire

 * is named co- to the Emperor . However, Tiberius becomes aware of Sejanus' treachery and has him arrested and executed.
 * — Crucifixion of  (according to one dating scheme).
 * becomes the leader of the after Sejanus is executed.
 * returns to from.

Deaths

 * —, Roman politician (executed)
 * ,  (possibly executed as an accomplice of Sejanus)
 * , niece and daughter-in-law of the emperor (starved to death for her role in a plot to overthrow  with her lover Sejanus)
 * , by stoning