Isaac II Angelos

Isaac II Angelos (lived 1156—1204, reigned 1185—1195) was a Byzantine emperor from 1185 to 1195 and co-emperor with his son Alexios IV Angelos from 1203 to 1204. He seized power from the previous emperor during a revolt and was later deposed. His son, Alexios, arranged with the Latin Catholics who, during the Fourth or Latin Crusade, were on their way to conquer Jerusalem and take it from the Muslims for their help restoring his father to the throne, with promises of support for their crusade. The Latins came and sacked Constantinople, destroyed much of it, took much of its treasures as loot, and sent it to Venice.