Rudolf IV, Duke of Austria

Rudolf IV
The half-frontal portrait, displayed above Rudolf's grave in the Stephansdom of Vienna for several decades after his death, now in the Museum of the Roman Catholic Archdiocese of Vienna. Apart from the (invented) archducal crown, the foreshortening of which the artist did not completely master, the portrait is realistic, since even the duke's incipient facial palsy is shown.
Duke of Austria
Reign1358–1365
PredecessorAlbert II
SuccessorAlbert III & Leopold III
Born1 November 1339
Vienna
Died27 July 1365(1365-07-27) (aged 25)
Milan
Burial
SpouseCatherine of Luxembourg
HouseHouse of Habsburg
FatherAlbert II, Duke of Austria
MotherJoanna of Pfirt

Rudolf IV (1 November 1339 – 27 July 1365), also called Rudolf the Founder (German: der Stifter), was a scion of the House of Habsburg who ruled as duke of Austria (self-proclaimed archduke), Styria and Carinthia from 1358, as well as count of Tyrol from 1363 and as the first duke of Carniola from 1364 until his death. He succeeded his father Albert II, Duke of Austria (d. 1358), who was not included among the seven imperial prince-electors by the Golden Bull of 1356. In order to acquire titles and honors higher than ducal, Rudolf commissioned the "Privilegium Maius", a forged document accompanied by several other forgeries, that were divised in order to elevate Austrian dukes to various titles, rights and privileges. The Emperor Charles IV refused to recognize and confirm the validity of those claims, but in spite of that, Rudolf started to use the archducal title by the middle of 1359, and continued to assert those claims until his death.