Protasof, Ambrose, a Russian prelate, distinguished by a talent of oratory unusual in the Russian Church, was born in 1769 at Moscow. He became a monastic at twenty-five, and was made archimandrite of a monastery near St. Petersburg; subsequently rector of the seminary of that capital, and in 1804 was elevated to the episcopal see of Seula, from whence he was transferred in 1807 to Kazan and Smirsk. He died in 1830 in Tver. His sermons evince a tolerant spirit. Some have been published in Le Messager de l'Europe, others in Le Fils de la Patrie, but have never been collected in separate form. — Hoefer, Nouv. Biog. Generale, s.v. See Otto, Hist. of Russian Literature, s.v.