Catalog of additional sources for Peter's martyrdom: Apocalypse of Peter, Ascension of Isaiah, Acts of Peter, Apocryphon of James, Dionysius of Corinth, Tertullian, Muratorian Canon

Mike lists multiple sources — some later and possibly embellished, but all drawing from a historical core — that confirm Peter's martyrdom. The methodology: even later legendary sources that elaborate must have a historical kernel. Their elaboration on Peter's martyrdom, consistent with the Roman persecution context and the early biblical and patristic evidence, confirms the core fact. Acts 4 is also cited: when Peter and John are commanded to stop preaching in Jesus's name, they reply they cannot stop proclaiming what they have seen and heard — demonstrating their sincerity and resolve.