Under the empire it seems to have flourished once again, but is not often mentioned in history. Martial speaks of its wine. Aemilianus, who had been proclaimed emperor by his soldiers in Moesia, was slain by them here on his way from Rome (AD 253), after a reign of three or four months. Rescripts of Constantine (326) and Julian (362) are dated from Spoleto. The foundation of the episcopal see dates from the 4th century: early martyrs of Spoleto are legends, but a letter to the bishop Caecilianus, from Pope Liberius in 354 constitutes its first historical mention. Owing to its elevated position Spoleto was an important stronghold during the Vandal and Gothic wars; its walls were dismantled by Totila.