Portrait of Baldwin IX, Emperor of Constantinople from 1204 to 1205.
He was defeated at the Battle of Adrianople by Kaloyan, the emperor of Bulgaria, and spent his last days as a prisoner.
Twenty years later, in 1225, a man appeared in Flanders claiming to be the presumed dead Baldwin. His claim soon became entangled in a series of rebellions and revolts in Flanders against the rule of Baldwin's daughter Jeanne. A number of people who had known Baldwin before the crusade rejected his claim, but he nonetheless attracted many followers from the ranks of the peasantry. Eventually unmasked as a Burgundian serf named Bertrand of Ray, the false Baldwin was executed in 1226.














