Joannes
Martyrological notice
The historical Roman Martyrology commemorates Joannes on 7 September. The Latin notice identifies the record as martyr. The source places the commemoration at Nicomediae.
Historical martyrology witness · Martyrologium Romanum (Latin historical edition)
Nicomediae natalis beati Joannis Martyris, qui, cum videret crudelia adversus Christianos edicta in foro pendere, hinc, fidei ardore accensus, injecta manu, illa detraxit atque discerpsit. Cumque hoc relatum esset Diocletiano et Maximiano Augustis, in eadem urbe constitutis, omnia suppliciorum genera in eum experiri jusserunt; quae vir nobilissimus tanta vultus ac spiritus alacritate pertulit, ut ne tristis quidem pro his videri poruerit.