Cecilia of Brandenburg
| Cecilia of Brandenburg | |
|---|---|
| Born | c. 1405 |
| Died | 4 January 1449 |
| Buried | Brunswick Cathedral |
| Noble family | House of Hohenzollern |
| Spouse(s) | William III, Duke of Brunswick-Lüneburg |
| Father | Frederick I, Elector of Brandenburg |
| Mother | Elisabeth of Bavaria-Landshut |
Cecilia of Brandenburg (c. 1405 – 4 January 1449) was a princess of Brandenburg by birth and by marriage a Duchess of Brunswick-Wolfenbüttel.
Cecilia was the daughter of Elector Frederick I of Brandenburg (1371–1440) from his marriage to Elizabeth (1383–1442), daughter of Duke Frederick of Bavaria-Landshut. Cecilia's brothers were the reigning Electors of Brandenburg, first Frederick II and later Albrecht III Achilles.
She married on 30 May 1423 in Berlin Duke William III of Brunswick-Lüneburg (1392–1482). The marriage had been arranged by Emperor Sigsmund, like that of her sister Magdalena with Duke Frederick II of Brunswick-Lüneburg. Both couples had been engaged on 3 March 1420.
William and his brother Henry II had promised Cecila as jointure Bodenteich Castle plus an annual pensionof 2000 guilders. After an exchange of territories, Cecilia received Wolfenbüttel Castle instead. Bishup Magnus of Saxe-Lauenburg tried to redeem pledges to Duke Henry II, and in particular Wolfenbüttel Castle. To avoid the claims of the bishop, Cecilia handed the castle to her brother-in-law Henry II in 1432. Henry managed to avert the claims of the bishop. However, he then asked Cecilia and her children to leave his castle. Cecilia was quoted as saying: this is not what your brother had in mind, and is behaviour unbecoming a Lord of Brunswick, even if I'd been only the wife of a lowly subject. Humiliated, Cecilia and her children moved to Schöningen Castle. A dispute then erupted between Henry and William. The dispute was settled by dividing the Duchy of Brunswick. Henry received Brunswick-Wolfenbüttel, while William had to make do with the Principality of Calenberg.
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