| Frederick II | |
|---|---|
 14th-century mosaic in the central apse of the Messina Cathedral | |
| King of Sicily | |
| Reign | 11 December 1295 – 25 June 1337 |
| Coronation | 25 March 1296 (Palermo) |
| Predecessor | James I |
| Successor | Peter II |
| Born | 13 December 1272 Barcelona, Crown of Aragon |
| Died | 25 June 1337 (aged 64) Paternò, Kingdom of Sicily |
| Burial | |
| Spouse | Eleanor of Anjou |
| Issue among others... | |
| House | House of Barcelona |
| Father | Peter III of Aragon |
| Mother | Constance of Sicily |
Frederick II (also Frederick III, Latin: Federicus, Italian: Federico, Sicilian: Fidiricu); 13 December 1272 – 25 June 1337) was the regent of the Kingdom of Sicily from 1291 until 1295 and subsequently King of Sicily from 1295 until his death. He was the third son of Peter III of Aragon and served in the War of the Sicilian Vespers on behalf of his father and brothers, Alfonso ΙΙΙ and James ΙΙ. He was confirmed as king by the Peace of Caltabellotta in 1302. His reign saw important constitutional reforms: the Constitutiones regales, Capitula alia, and Ordinationes generales.