Nicephori
Martyrological notice
The historical Roman Martyrology commemorates Nicephori on 2 June. The Latin notice identifies the record as bishop. The source places the commemoration at In insula Proconneso, in Propontide.
Historical martyrology witness · Martyrologium Romanum (Latin historical edition)
In insula Proconneso, in Propontide, sancti Nicephori, Episcopi Constantinopolitani, qui, paternarum traditionum propugnator acerrimus, pro cultu sanctarum Imaginum se Leoni Armeno, Imperatori Iconoclastae, constanter opposuit; a quo mulctatus exsilio, ibidem, cum per quatuordecim annos longum duxisset martyrium, migravit ad Dominum.