We know little about this character and the scant information we have is uncertain. He ranked second in the list of Bishops of Toulouse, including Saint Saturninus, Martyr to the 250 and Rhodes, who died in 358, but his name comes from the legend of St. Firmino martyr, “the story of the most fabulous,” according to Duchesne. According to this document, Honoratus, bishop of Toulouse, was educated and ordained bishop Firmino, son of Senator Spanish Firmus, himself converted by Saint Saturnino.
His body was found in 1265 in the basilica of St-Sernin and was the object of worship in the 15th centiry; his name was added to December 22 in the calendar of a Breviary copied in 1404.
Author: Henri Platelle
Source: Santi e Beati