Roman emperor Diocletian and co-emperor Maximian retire from office.
Diocletian goes to his homeland, Dalmatia, where he has a heavily fortified palace near the town of Spalatum (modern-day Split). Maximian goes to Campania in Italy. The two are close enough to remain in regular contact.
They also maintain some contact with their successors, though Diocletian refuses to get involved directly with politics and even refuses to intercede when the tetrarchic system he created implodes through the conflict between Constantine and Maxentius.
Diocletian lives three years in retirement, mostly tending his garden, and some believe that he commits suicide in despair over what happened to the system he had created while emperor.