The Kingdom of Bohemia (Czech: České království; German: Königreich Böhmen; Latin: Regnum Bohemiae) was a country in Central Europe formally established in 1212 by the Golden Bull of Sicily issued by the Roman king and emperor Frederick II, although some former rulers of Bohemia enjoyed a non-hereditary royal title. The Kingdom was an autonomous part of the Holy Roman Empire, later a part of the Austrian Empire and was dissolved in 1918 with the fall of Austria-Hungary when the last king of Bohemia Charles III abdicated. The national assembly then deposed the Habsburg-Lothringen dynasty and proclaimed the Czechoslovak republic.
The northern part of the Upper Palatinate, incorporated by Karel IV in 1355. Karel's son Václav lost the Upper Palatinate in 1400 to King Rupert of Germany.
During the reign of the last Přemyslids and the succeeding House of Luxembourg, especially after the accession of Emperor Karel IV 1346 - 1378 and the issue of the Golden Bull of 1356, the Bohemian Kingdom was the most powerful state of the Holy Roman Empire. Thus the Lands of the Bohemian Crown were not part of the Imperial Circles as established by the 1500 Imperial Reform.