Joanna, Duchess of Brabant
| Joanna | |
|---|---|
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Duchess of Brabant Duchess of Lothier Duchess of Limburg |
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 |
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| Spouse(s) |
William IV, Count of Holland Wenceslaus I, Duke of Luxembourg |
| Noble family | Reginar |
| Father | John III, Duke of Brabant |
| Mother | Marie d'Évreux |
| Born | 24 June 1322 |
| Died | 1 November 1406 (aged 84) |
Joanna, Duchess of Brabant (24 June 1322 – 1 November 1406), also known as Jeanne, was the heiress of Duke John III, who died in Brussels, 5 December 1355. Her mother was Marie d'Évreux.
Joanna's first marriage, in 1334, was to William IV, Count of Holland (1307–1345), who subsequently died in battle and their only son William died young, thus foiling the project of unifying their territories.
Her second marriage was to Wenceslaus of Luxemburg. The famous document, the foundation of the rule of law in Brabant called the Blijde Inkomst ("Joyous Entry"), was arrived at in January 1356, in order to assure Joanna and her consort peacable entry into their capital and to settle the inheritance of the Duchy of Brabant on her "natural heirs", who were Joanna's sisters, they being more acceptable to the burghers of Brabant than rule by the House of Luxembourg.
The document was seen as a dead letter, followed by a military incursion in 1356 into Brabant by Louis II of Flanders, who had married Margaret, Joanna's younger sister, and considered himself Duke of Brabant by right of his wife. With the Duchy overrun by Louis' forces, Joanna and Wencelaus signed the humiliating Treaty of Ath, which ceded Malines and Antwerp to Louis. By August 1356 Joanna and Wencelaus had called upon the Emperor, Charles IV to support them by force of arms. Charles met at Maastricht with the parties concerned, including representatives of the towns, and all agreed to nullify certain terms of the Blijde Inkomst, to satisfy the Luxembourg dynasty.The duchy continued to deteriorate with Wencelaus's defeat and capture at the battle of Baesweiler in 1371.
On Joanna's death, by agreement the Duchy passed to her great-nephew Antoine, the second son of her niece Margaret III, Countess of Flanders.
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