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1195–1250 · Hohenstaufen
King of Sicily, Holy Roman Emperor (1194–1250, 1220–1250). Born at Jesi. Died at Castel Fiorentino.
See Frederick II, Holy Roman Emperor on the tree On the map Thrones
| 1195– | Duke of Swabia |
| 1196–1250 | King of the Romans |
| 1198– | King of Sicily |
| 1220–1250 | Holy Roman Emperor |
| 1225–1228 | King of Jerusalem |
The monk Salimbene, who disliked Frederick II, says the emperor had infants raised without anyone speaking to them, to find out what language humans speak naturally. The experiment allegedly failed because the children died.