Their unreliable Acts state that Firmus and Rusticus, kinsmen, were prominent citizens of Bergamo.

According to tradition, the soldier Firmus was captured for the sake of his faith and brought to Milan.

They were martyred at Verona under the Emperor Maximian after refusing to sacrifice to pagan idols.

It has been postulated that Firmus and Rusticus were actually two martyrs of Africa whose relics were translated to Verona.

[5] A tenth century account says that the relics of Firmus and Rusticus had first been taken to Africa, then to Capodistria and finally to Trieste, before bishop Anno had them re-buried them in a lead coffer within the high altar.