The Crusades and their effects
The Crusades were a series of religious wars launched by Latin Christian Europe, mainly between 1095 and 1291, aimed chiefly at taking and holding Jerusalem and the surrounding Holy Land, then under Muslim rule. In 1095, after the Byzantine emperor asked for help against the Seljuk Turks, Pope Urban II called for the First Crusade, and crusaders captured Jerusalem in 1099, killing many of its inhabitants. The Muslim leader Saladin retook Jerusalem in 1187, later crusades mostly failed, the Fourth Crusade turned against fellow Christians and sacked Constantinople in 1204, and the last crusader stronghold, Acre, fell in 1291. The Crusades had lasting effects: they increased trade between Europe and the eastern Mediterranean, enriching Italian cities like Venice and Genoa; they helped bring knowledge and goods from the Islamic world into Europe; they weakened the Byzantine Empire; they deepened hostility between Christians and Muslims; and they triggered violence against Jewish communities in Europe, beginning with massacres in the Rhineland in 1096.
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