This book presents the dramatic and complex story of Armenia's ecclesiastical relations with Byzantine and subsequently Roman Christendom in the Middle Ages. It is built on a broad foundation of sources - Armenian, Greek, Latin, and Syrian chronicles and documents, especially the abundant correspondence between the Holy See and the Armenian Church. Krzysztof Stopka examines problems straddling the disciplines of history and theology and pertinent to a critical, though not widely known, episode in the story of the struggle for Christian unity.