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and admiral under the Byzantine emperors Michael III (r. 842–867) and Basil I the Macedonian (r. 867–886), who achieved several naval victories against the Saracen raiders.
While Petar's reign witnessed the spread of the Bogomil heresy, its origins were more demographic (perhaps inspired by Paulicians settled earlier by Byzantine emperors in Thrace) than social, and the Bulgarian Orthodox Church canonized him as a saint.