He is honoured as a Saint in the Catholic Church and his feast day is on December 3.

Sources record the presence of Mirocles to the Lateran council held in October 313 in Rome, under Pope Miltiades, which took a stand in the Donatism issue, condemning Donatus Magnus charged to re-baptizing clergy who had lapsed and which sided with Caecilianus bishop of Carthage.

Mirocles participated also in the following council of all the Western bishops held in Arles on 1 August 314, which confirmed the condemnation of Donatus and ruled about canon law.

[3] Mirocles possibly founded also the church of San Vittore al Corpo in Milan (rebuilt many times during the next centuries) in honor of saint Victor Maurus, who was martyred during the reign of Emperor Diocletian in 303.

His body was buried in Milan in the church of San Vittore al Corpo.