Proculus of Bologna was a Roman military officer who lived during the third and early fourth centuries. According to tradition, he was martyred in Bologna around 304 AD during the persecutions under the reign of Diocletian. While some accounts identify him as a soldier who actively spread the Christian faith, other narratives suggest he was a bishop from Terni fleeing Gothic persecution. Regardless of the specific legend, he remains a significant figure in the religious history of the region.
Life and death

One tradition describes Proculus as a soldier who killed a cruel official named Marinus with an axe to stop the enforcement of imperial edicts. Following this act, he was executed by beheading. In another version of his story, he was a bishop from Terni who sought refuge in Bologna, only to be decapitated there. In both accounts, his death occurred in the vicinity of modern-day Bologna.
Veneration and legacy
As a patron of Bologna, he has been honored by the local population since ancient times. His relics are kept within the church of San Procolo. His memory is also preserved through art, including a statue located on the spire of the Milan Cathedral. He is commemorated annually on June 1.
