Saint Nicomedes was a martyr from Ancient Rome whose specific era of life remains uncertain. While some traditions suggest he lived during the first century, other accounts place his death during the reign of Emperor Maximianus in the early fourth century. He is recognized as a martyr of the Roman Church, and his burial site was located in a catacomb on the Via Nomentana. He is commemorated by Catholic, Orthodox, and Anglican traditions, with his feast day observed on September 15.