Alexios IV Angelos
Alexios IV Angelos (c. 1182–1204), son of the blinded Emperor Isaac II Angelos, was imprisoned when his uncle Alexios III seized the throne in 1195. Smuggled out of Constantinople in 1201, he fled to his brother-in-law Philip of Swabia and diverted the Fourth Crusade, promising pay, troops and church union.
Isaac II was restored in July 1203 and Alexios crowned co-emperor in August, but he soon clashed with the Latins and the city's populace. Alexios Doukas Mourtzouphlos seized him on 27 January 1204 and had him strangled around 8 February.