Siege of Constantinople (1203) - Wikipedia
https://en.wikipedia.org/wiki/Siege_of_Constantinople_(1203)
WEBThe Siege of Constantinople in 1203 was a crucial episode of the Fourth Crusade, marking the beginning of a series of events that would ultimately lead to the fall of the Byzantine capital. The crusaders, diverted from their original mission to reclaim Jerusalem , found themselves in Constantinople, in support of the deposed emperor Isaac II ...
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