Historical Context
The account places the martyrdom within the Diocletianic persecution of the early fourth century (conventionally dated 303-311), the last and most severe of the empire-wide Roman persecutions of Christians, in which soldiers who professed the faith were a frequent target. Callistratus is presented as a serving soldier whose private prayer, overheard by a comrade, exposed him to interrogation by his military superior.
The surviving hagiography was compiled by the tenth-century Byzantine hagiographer Symeon the Metaphrast, and Callistratus and his company are listed in the Synaxarium of the Church of Constantinople under September 27. Some traditions name Carthage as his birthplace, while the database record situates the group's veneration in the Roman setting of his military service.