Rudolf IV, Duke of Austria in the context of "Archduke"

The University of Vienna (German: Universität Wien, Austrian German: [univɛrsiˈtɛːt ˈviːn]) is a public research university in Vienna, Austria. Founded by Duke Rudolph IV in 1365, it is the oldest university in the German-speaking world and among the largest institutions of higher learning in Europe.

The University of Vienna is associated with 17 Nobel Prize laureates and has been home to numerous scholars of historical and academic significance, including Erwin Schrödinger, Karl Popper, Stefan Zweig, Friedrich Hayek, Gustav Mahler, Sigmund Freud, Gregor Mendel, Ludwig von Mises, among others.

The Duchy of Austria (Latin: Austriae Ducatus; Middle High German: Herzogtum Österreich) was a medieval principality of the Holy Roman Empire, established in 1156 by the Privilegium Minus, when the Margraviate of Austria (Ostarrîchi) was detached from Bavaria and elevated to a duchy in its own right. After the ruling dukes of the House of Babenberg became extinct in male line, there was as much as three decades of rivalry on inheritance and rulership, until the German king Rudolf I took over the dominion as the first monarch of the Habsburg dynasty in 1276. Thereafter, Austria became the patrimony and ancestral homeland of the dynasty and the nucleus of the Habsburg monarchy. In 1453, the archducal title of the Austrian rulers, invented by Duke Rudolf IV in the forged Privilegium Maius of 1359, was officially acknowledged by the Habsburg emperor Frederick III.

The Privilegium maius (German: Großer Freiheitsbrief 'greater privilege') was a set of medieval documents forged in 1358 or 1359 at the behest of Duke Rudolf IV of Austria (1358–65) of the House of Habsburg. It was essentially a modified version of the Privilegium minus issued by Emperor Frederick I Barbarossa in 1156, which had elevated the former March of Austria into a duchy. In a similar way, the Privilegium maius elevated the duchy into an Archduchy of Austria.

The privileges described in the documents had great influence on the Austrian political landscape, and created a unique connection between the House of Habsburg and Austria.

The Leopoldian line was a sequence of descent in the Habsburg dynasty begun by Duke Leopold III of Austria. The line of descent followed the death of his elder brother Rudolf IV, who divided the Habsburg hereditary lands with his brother Albert III according to the 1379 Treaty of Neuberg.