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.