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Albrecht IV (December 15, 1447 – March 18, 1508), was Duke of Bavaria-Munich from 1467, and Duke of a reunited Bavaria from 1503.

Albrecht IV was a son of Albrecht III, Duke of Bavaria and Anna of Brunswick-Grubenhagen-Einbeck. After the death of his older brother Johann IV, Duke of Bavaria he gave up his spiritual career and returned from Pavia to Munich. When his brothers Christoph and Wolfgang had resigned Albrecht III became sole duke, but a new duchy Bavaria-Dachau was created from Bavaria-Munich for his brother Duke Sigismund in 1467. After Sigismund’s death in 1501, it reverted to Bavaria-Munich.

Albrecht IV, Duke of Bavaria

On January 3, 1487 Albrecht IV married Archduchess Kunigunde of Austria, daughter of Friedrich III, Holy Roman Emperor and his wife Eleonor of Portugal.

The marriage of Kunigunde of Austria to Albrecht IV, was a result of intrigues and deception, but must be counted as a defeat for Emperor Friedrich III. Albrecht illegally took control of some imperial fiefs and then asked to marry Kunigunde (who lived in Innsbruck, far from her father), offering to give her the fiefs as a dowry.

The Emperor agreed at first, but after Albrecht IV took over yet another fief, Regensburg, Emperor Friedrich III withdrew his consent for the marriage. On January 2, 1487, however, before the Emperor’s change of heart could be communicated to his daughter, Kunigunde married Albrecht.

A war was prevented only by intermediation by the Emperor’s son, Maximilian I. For Albrecht’s wedding, Grünwald Castle was extended in 1486/87 under the direction of Jörg von Weikertshausen. Albrecht finally decided to return territorial acquisitions in Swabia in 1492 to avoid a war with the Habsburg and the Swabian League. He then also had to release Regensburg, which had been reunited with Bavaria in 1486, and had to reluctantly renounce Further Austria when Archduke Sigismund of Austria tried to make it over to Albrecht.

Archduchess Kunigunde of Austria, Duchess of Bavaria

After the death of the last duke of Bavaria-Landshut, Georg in 1503, Albrecht managed to reunite the whole of Bavaria in a dreadful war against Georg’s heirs, the Palatinate line of his Wittelsbach family but had to transfer the most southern districts of Bavaria-Landshut to his brother-in-law Emperor Maximilian as compensation for his support: Kufstein, Kitzbühel and Rattenberg passed to Maximilian in 1506 and were united with Tyrol. For the Palatinate branch a new duchy of Palatinate-Neuburg was created.

To avoid any future division of Bavaria, Albrecht decreeds the everlasting succession of the firstborn prince in 1506. Nevertheless, his oldest son and successor Wilhelm IV, Duke of Bavaria had to share his power from 1516 onwards with his younger brother Ludwig X, Duke of Bavaria. After the death of Ludwig X in 1545, the edict became effective until the end of Bavarian monarchy in 1918.

Albrecht IV is buried in the Frauenkirche in Munich.