The Fourth Crusade was originally intended to conquer Muslim-controlled Jerusalem by means of an invasion through Egypt. Instead, in April 1204, the Crusaders of Western Europe invaded and sacked the Christian city of Constantinople, capital of the Eastern Roman Empire. This is seen as one of the final acts in the Great Schism between the Eastern Orthodox Church and Roman Catholic Church, and a key turning point in the decline of the Empire and of Christianity in the Near East. The crusaders established the Latin Empire and other "Latin" states in the Byzantine lands they conquered. Byzantine resistance in unconquered sections of the empire such as Nicaea, Trebizond, and Epirus ultimately liberated the capital and overthrew the crusader states. Wikipedia [ - ]

The Fourth Crusade was originally intended to conquer Muslim-controlled Jerusalem by means of an... [ + ]