Complex sentence: Began to openly profess and preach the Catholic faith in 1698, according to a denunciation of the priest of the same Peter and Paul Church Patriarch Adrian, harbored many followed his heresy (in another source: charm).
Split into simpler sentences: Began to openly profess and preach the Catholic faith in 1698. According to a denunciation of the priest of the same Peter and Paul Church to Patriarch Adrian, harbored many followed his heresy (in another source: charm).