Albert II, 1397–1439, Holy Roman Emperor, king of Hungary and Bohemia (1438–39), duke of Austria (1404–38). He was the son-in-law of Holy Roman Emperor Sigismund, whom he aided against the Hussites of Bohemia. Albert was unable to suppress the Bohemian revolts (see Hussite Wars) and subsequently died on a disastrous campaign against the Turks. With Albert began the lasting Hapsburg rule over the Holy Roman Empire.
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