Reichsacht
Another opportunity for a Habsburg gain in power opened when in 1306 King Wenceslaus III, the last Bohemian ruler of the Přemyslid dynasty, was killed and Albert I was able to seize his kingdom as an escheated fief. Rudolph was then vested with the Bohemian throne. This was contested by his maternal uncle Duke Henry of Carinthia, husband of Wenceslaus' sister Anne. When several Bohemian nobles elected Henry King of Bohemia, Albert I placed his brother-in-law under the Imperial ban and marched against Prague. Henry fled, first to Bavaria, then back to his Carinthian homelands. To further legitimate the Habsburg claims to the Bohemian and the Polish throne, Albert had Rudolph married to Elizabeth Richeza of Poland, widow of King Wenceslaus II.