Frederick IV, Duke of Austria
| Frederick IV | |
|---|---|
| Duke of Austria | |
Fredericus dux Austriae, 16th century portrait by an unknown artist
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| Spouse(s) | Elisabeth of the Palatinate Anna of Brunswick-Lüneburg |
| Issue | |
| Noble family | House of Habsburg |
| Father | Leopold III |
| Mother | Viridis Visconti |
| Born | 1382 |
| Died | 24 June 1439 Innsbruck, Tyrol |
| Buried | Stams Abbey |
Frederick IV (1382 – 24 June 1439), also known as Frederick of the Empty Pockets (German: Friedrich mit der leeren Tasche), a member of the House of Habsburg, was Duke of Austria from 1402 until his death. As a scion of the Habsburg Leopoldian line, he ruled over Further Austria and the County of Tyrol from 1406 onwards.
Frederick was the youngest son of Duke Leopold III (1351–1386) and his wife Viridis (d. 1414), a daughter of Bernabò Visconti, Lord of Milan. According to the 1379 Treaty of Neuberg, his father ruled over the Habsburg Inner Austrian territories of Styria, Carinthia, Carniola, as well as over Tyrol and the dynasty's original Further Austrian possessions in Swabia. After the early death of Duke Leopold in the 1386 Battle of Sempach, Frederick and his elder brothers William, Leopold IV and Ernest initially remained under the tutelage of their uncle Duke Albert III of Austria.
As an inheritance dispute arose upon Duke Albert's death in 1395, the young Leopoldian dukes insisted on their rights: the next year, William went on to rule the Inner Austrian lands and Leopold IV ascended as Count of Tyrol. When Frederick came of age in 1402, he was formally assigned to administrate his father's inheritance in the scattered Habsburg territories in Swabia, referred to collectively as Further Austria (Vorderösterreich) and took his residence in Freiburg im Breisgau. Another division of the Leopoldian territories took place after William' death in 1406: Duke Leopold IV, now eldest heir, ceded Tyrol to Frederick, however, he did not become sole ruler in Further Austria until Leopold's death in 1411.
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