Dionysius
Martyrological notice
The historical Roman Martyrology commemorates Dionysius on 25 May. The Latin notice identifies the record as bishop. The source places the commemoration at Mediolani.
Historical martyrology witness · Martyrologium Romanum (Latin historical edition)
Mediolani sancti Dionysii Episcopi, qui, ab Ariano Imperatore Constantio in Cappadociam pro fide catholica relegatus, ibidem, propiore Martyribus titulo, spiritum Deo reddidit. Ejus sacrum corpus ab Aurelio Episcopo transmlssum est Mediolanum ad beatum Ambrosium Episcopum; cui piae actioni officium quoque sancti Basilii Magni accessisse traditur.