Pociey, Hypatius a Russian prelate, was born at Bajanise in 1541. He occupied a conspicuous place in the religious history of Russia by the share he had, in 1595, in the return of the western provinces of the empire to the Roman Catholic Church. He was sent to Rome, with several of his colleagues, to signify the obedience of the converted provinces to the holy see: we have an account of this event by Baronius. Pociev devoted his whole life to cementing and extending this union which was finally destroyed by the emperor Nicholas in 1839. Pociey was bishop of Vladimir and Bresc, and died at Vladimir July 28, 1613. He left a number of Homilies, published by Leo. Kiszka (Kazania y Homilie Hipacisca Pocieia, 1714, 4to) The Union, all exposition of the principal articles relating to the union of the Greeks with the Roman Church (Wilna, 1595): — all Account of the embassy which the Ruthenians, in 1476, sent to Sixtus IV (Wilna, 1605, 4to); we know only one copy of this work, that in the Imperial Library of St. Petersburg: — Privileges granted to the Uniates by the Kings of Poland (Wilna, s. d., about 1706): — divers Epistles disseminated in the Annales de la Societe Archlologique de Saint-Petersbourg, the most remarkable being addressed to the patriarch of Alexandria: — his Testament, inserted in the Review of Posen. Hoefer, Nouv. Biog. Géneralé, s.v.