Golden Bull of Sicily
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The so-called Golden Bull of Sicily was a decree issued by the Roman king and emperor Frederick II in Basel on 26 September 1212 that certified hereditary royal title for Otakar I of Bohemia and his successors and determined the rights and the duties of the Bohemian monarchs (the Kings of Bohemia). By this act Frederick II also declared that he and the Empire will give the investiture for Bohemia only to a ruler approved by the people of the country.