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.
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The icons were created by the noted artist Svetlin Rusev and were not generally approved by the Holy Synod of the Bulgarian Orthodox Church for being too realistic and not conforming to the canons.