Albert IV (1377 - 1404) was the Archduke of Austria from 1395 until 1404. Albert was born on 19 September 1377 to Archduke Albert III of the Habsburg dynasty. On 24 April 1390, at thirteen years of age, he was married to Joan of Bavaria. Albert succeeded his father in 1395. His reign was marked by bitter disputes with the Leopoldinian line of the Habsburgs (which ruled Styria, Tyrol, Carinthia, and Carniola) and the Luxembourger Holy Roman Emperors Wenceslaus and Sigismund.