As bishop, Vigilius attempted to convert Arians and pagans to Nicene Christianity and is said to have founded thirty parishes in his diocese.

[3] In 397, Sisinnius, Martyrius and Alexander (Sisinio, Martirio e Alessandro) were killed at Sanzeno after they attempted to convert the local population there to Christianity.

Vigilius forgave their killers and had the remains of the three men sent to John Chrysostom in Constantinople, as well as to Simplician, Ambrose's successor, in Milan.

Milan would later give some of those relics back to Sanzeno in the 20th century, where they rest in the (Basilica dei Santi Martiri [it]).

[6][3] A statue of the god Neptune stands atop a fountain in front of Vigilius' shrine in Trent today.

[3] A German farmers' saying associated with a 2nd feast day of 31 January was: "Friert es zu Vigilius / im März die Eiseskälte kommen muss!"

Nicholas Everett, Patron Saints of Early Medieval Italy AD c.350-800 (PIMS/Durham University Press, 2016), pp.124-138.