The Kingdom of Thessalonica was a short-lived state that emerged during the Fourth Crusade after the sack of Constantinople in 1204.

The Fourth Crusade was sold to Christian commoners ... and even defiled the Hagia[a] Sophia. The Byzantine Empire, already weakened by internal struggles, never fully recovered.

Rarely does a documentary film about Medieval history evoke such heated discussion and growing polemic in society as did the film, The Fall of an Empire—the Lesson of ... by Latin knights during the ...