St. Josaphat: The Apostolic Martyr Saint Josaphat was a Ukrainian Greek Catholic Archbishop of Polotsk who became a martyr for the cause of Church unity. Born in Volhynia (part of modern day Ukraine), he was a principal architect and fierce defender of the Union of Brest (1596), which brought millions of Ruthenian Orthodox Christians into full communion with the Holy See in Rome, while allowing them to retain their Eastern rites, liturgy, and married clergy. As a Basilian monk and later Archbish