Crusaders and schism in the East

"Part one of this program documents both the papal reforms that severed the ties between the Church and the wealthy Roman families and the rift between Rome and Constantinople. Efforts to reconcile differences in doctrine, clerical practice, and political influence ended in the excommunication of Constantinople's Patriarch. Part two outlines the first four Crusades, in which Jerusalem was won and lost and Byzantium fell to the swords of its own Christian allies. The transfiguring influence of Islamic scholarship on Europe is also spotlighted"--Container.