"Enzo (or Enzio;[a] c. 1218 – 14 March 1272) was an illegitimate son of the Hohenstaufen emperor Frederick II, who appointed him ´King of Sardinia´ in 1238. He played a major role in the wars between Guelphs and Ghibellines in the Imperial kingdom of Italy, and was captured by his enemies in 1249. He remained imprisoned in Bologna until his death.
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