Henry IX, Duke of Bavaria
| Henry IX | |
|---|---|
| Duke of Bavaria | |
Henry IX and his wife Wulfhilde, Historia Welforum (12th century)
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| Spouse(s) | Wulfhilde of Saxony |
| Issue | |
| Noble family | House of Welf |
| Father | Welf I, Duke of Bavaria |
| Mother | Judith of Flanders |
| Born | 1075 |
| Died | 13 December 1126 (aged 50–51) Ravensburg, Swabia |
| Buried | Weingarten Abbey |
Henry IX (1075 – 13 December 1126), called the Black, a member of the House of Welf, was Duke of Bavaria from 1120 to 1126.
Henry was the second son of Duke Welf I of Bavaria (d. 1101) from his marriage with Judith, daughter of Count Baldwin IV of Flanders. As a young man, he administered the family's Este property south of the Alps.
Through his marriage to Wulfhilde, daughter of Duke Magnus of Saxony, about 1095, he acquired part of the Billung estates around Lüneburg (the nucleus of the later Welf duchy of Brunswick-Lüneburg). He aspired to succeed his father-in-law as Saxon duke when Magnus died without male heirs in 1106, but was denied as the new king Henry V enfeoffed his follower Count Lothair of Supplinburg.
Duke Henry nevertheless upheld close relations with the ruling Salian dynasty. In 1116, he joined Emperor Henry V's second Italian campaign to seize the estates of late Margravine Matilda of Tuscany. He succeeded his elder brother Welf II as Bavarian duke, when the latter died childless in 1120. Henry was also instrumental in bringing about the 1122 Concordat of Worms, ending the long-lasting Investiture Controversy between Pope and Emperor.
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