Petrus
Martyrological notice
The historical Roman Martyrology commemorates Petrus on 6 April. The Latin notice identifies the record as martyr. The source places the commemoration at Mediolani.
Historical martyrology witness · Martyrologium Romanum (Latin historical edition)
Mediolani passio sancti Petri, ex Ordine Praedicatorum, Martyris, qui ab haereticis, ob fidem catholicam, interemptus est. lpsius tamen festivitas recolitur tertio Kalendas Maji.