It happened that Flaccus, a general of the forces, arrived at Spoleto with an order from the Emperor Maximian to punish all the Christians.

According to pious tradition, after his death his remains were to be fed to the wild animals kept for public games.

However, a Christian woman (whose name is not known) bought them back for a considerable sum of money and had them properly prepared for burial.

At the request of the Holy Roman Emperor, Otto I, Gregory's body was sent to Cologne, Germany with the relics of Saints Felix and Nabor.

In 993, some of Gregory's relics were transferred to the cathedral in Trier, Germany by the bishop, Egbert.