Philip I, Duke of Brunswick-Grubenhagen
| Philip I, Duke of Brunswick-Grubenhagen | |
|---|---|
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| Spouse(s) | N.N. Catherine of Mansfeld-Vorderort |
| Issue | |
| Noble family | House of Guelf |
| Father | Albert II, Duke of Brunswick-Grubenhagen |
| Mother | Countess Elizabeth of Waldeck |
| Born | 1476 |
| Died | 4 September 1551 Herzberg |
Philip I, Duke of Brunswick-Grubenhagen (German: Philipp I., Herzog von Braunschweig-Grubenhagen; 1476 – 4 September 1551, Herzberg) was a member of the House of Guelph. He was ruler of the Principality of Grubenhagen. He was the second son of Duke Albert II of Grubenhagen and his wife Elizabeth, née Countess of Waldeck. Philip was the last member of the Grubenhagen line to use the title Duke of Brunswick. His successors used the title Duke of Brunswick and Lüneburg, like most other princes of the House of Guelph.
After his father's death in 1485, he was first under the guardianship of his cousin Henry IV and his mother Elisabeth. As early as 1486 he signed deeds himself. In 1494, he took up the government of his principality. His seat, Herzberg Castle, was completely destroyed in a fire in 1510. His cousin Henry died childless in 1526 and Philip inherited Henry's part of the principality, thereby reuniting all of Grubenhagen under a single Duke for the first time since 1479.
Philip was one of the first princes to follow the Reformation. He was present at the Diet of Worms in 1521 and joined the League of Torgau in 1526. In 1531, he formed, with other princes, the Schmalkaldic League. He then reformed the monasteries in his principality and in 1538, he adopted a Church order for Grubenhagen and declared the papal doctrine to be abolished. In 1546 Philip and his sons participated in a military campaign in the Schmalkaldic War in southern Germany, which ended unsuccessfully at Ingolstadt. This campaign drew the ire of Emperor Charles V. After the utter defeat of the Protestants, he was acquitted in 1548 and reinstated as Duke.
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