Eusebius
Martyrological notice
The historical Roman Martyrology commemorates Eusebius on 1 August. The Latin notice identifies the record as martyr and bishop. The source places the commemoration at Vercellis.
Historical martyrology witness · Martyrologium Romanum (Latin historical edition)
Vercellis natalis sancti Eusebii, Episcopi et Martyris, qui, ob confessionem fidei catholicae, a Constantio Principe Scythopolim, in Palaestina, et inde in Cappadociam relegatus, postmodum ad Ecclesiam suam reversus, martyrium, persequentibus Arianis, passus est. Ipsius autem memoria etiam decimo octavo Kalendas Januarii solemniter habetur, quo die fuit Episcopus ordinatus; ejusque festum recolitur decimo septimo Kalendas Januarii.