Josaphat, an Eastern Rite bishop, is held up as a martyr to church unity because he died trying to bring part of the Orthodox Church into union with Rome. In 1054, a formal split called a schism took place between the Eastern Church centered in Constantinople and the Western Church centered in Rome. Trouble between the two had been brewing for centuries because of cultural, political, and theological differences. In 1054 Cardinal Humbert was sent to Constantinople to try and reconcile the ...