Acerenza has three patrons, each with his own day: Saint Marianus on 30 April, Saint Canius on 25 May and Saint Laviero on 17 November.
Laviero is the one from home. He was born in Acerenza, in vico Tergia, and died a martyr at Grumentum on 17 November 312: the feast of that day is preceded by a solemn triduum of prayer in the church dedicated to him.

