Lev Krevza's Defense of Church Unity (1617) and Zaxariya Kopystens'kyj's Palinodiya or Book of Defense of the Holy Apostolic Eastern Catholic Church and Holy Patriarchs (1620-1623)

Parts 1 and 2

Lev Krevza

Omeljan Pritsak

Bohdan Struminsky

Omeljan Pritsak is Mykhailo Hryshevs'kyi Professor of Ukrainian History, Emeritus, at Harvard University.

Bohdan Struminsky is a research fellow of the Ukrainian Research Institute, Harvard University.