Enzio ān´tsēō [key] or Enzo ān´tsō [key], c.1220–72, king of Sardinia, illegitimate son of Holy Roman Emperor Frederick II . He married a Sardinian heiress and was made king of Sardinia by his father. In the wars between Frederick and the pope he fought gallantly in Italy. Helping Modena against Bologna , he was defeated and captured (1249) at Fossalta. Until his death he was kept prisoner in Bologna, in the palace that came to bear his name.
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