During the Diocleian persecution, Proculus, bishop of Verona went to the prison to encourage Firmus and Rusticus. He was bound and brought with them before Anulinus, the consul. However, as Proculus was elderly, Anulinus did not consider him worth his interest, and had him released, beaten, and driven from the city. He lived to survive the persecutions. 
Attached to the Basilica di San Zeno in Verona is the Church of San Procolo housing the relics of Saint Proculus. It dates from the 6th or 7th century, being erected in the Christian necropolis across the Via Gallica. It is first mentioned, however, only in 845.