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Why was King Enzio imprisoned by the Bolognese?
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Frederick II
Frederick II, bust, c. 13th century; in the collection of the Museo Provinciale Campano, Capua, Italy.
King Enzio, the natural son of Emperor Frederick II, was imprisoned by the Bolognese following his defeat in the Battle of Fossalta in May 1249.12
During this conflict, Enzio led a Ghibelline army against a joint force composed of Lombard and Bolognese troops. The Ghibelline forces were crushed in the engagement, leading to Enzio's capture. He remained in captivity in Bologna for the rest of his life, dying there in 1272. His imprisonment is still commemorated in the city today by the Palazzo Re Enzio, which served as his place of confinement.213