Lev Krevza’s A Defense of Church Unity and Zaxarija Kopystens’kyj’s Palinodia, Parts 1 and 2

Krevza's Defense, on the Uniate side, and Kopystens'kyj's Palinodia (1621), a defense of the Eastern Church, are perhaps the most illuminating works on the debate that culminated at the time of the Union of Brest (1596), when much of the Ruthenian ecclesiastical hierarchy declared itself in communion with the Roman Catholic Church.