The Czech state was formed in the late 9th century as the Duchy of Bohemia under the Great Moravian Empire. After the fall of the Empire in 907, the centre of power transferred from Moravia to Bohemia under the Přemyslids. In 1004, the duchy was formally recognized as part of the Holy Roman Empire,[11][12] becoming the Kingdom of Bohemia in 1212, and reaching its greatest territorial extent in the 14th century. The King of Bohemia ruled not only Bohemia itself, but also other lands, which together formed the so-called Crown of Bohemia, and he had a vote in the election of the Holy Roman Emperor. In the Hussite wars of the 15th century driven by the Bohemian Reformation, the kingdom faced economic embargoes and defeated five crusades proclaimed by the leaders of the Roman Catholic Church an