Henry I, Duke of Brunswick-Grubenhagen

For other people named Henry of Brunswick-Lüneburg, see Henry of Brunswick-Lüneburg (disambiguation).

Henry (August 1267 – 7 September 1322, Salzderhelden), Duke of Brunswick-Lüneburg, called the Admirable (Latin Henricus Mirabilis), was the first ruler of the Principality of Grubenhagen.

The eldest son of Albert I, Duke of Brunswick-Lüneburg, he first ruled the Principality of Wolfenbüttel after his father's death jointly with two of his brothers. In 1291 the brothers divided the territory; Henry received the part that came to be known as Principality of Grubenhagen. It included the cities of Einbeck, half of Hamelin, Clausthal, Amelungsborn, Duderstadt, Herzberg, and Osterode. Henry quarreled with his brother Albert, who had received the Principality of Göttingen, over the remaining belittled areas around Brunswick and Wolfenbüttel, but Albert prevailed, and Henry retreated to Grubenhagen. He took Einbeck as his residence.

In 1320, Henry was appointed count palatine of Saxony by the emperor. He died in 1322, and his three surviving sons who had not joined the Church divided his territory among each other.

Family

Henry married Agnes, daughter of Albert the Degenerate, Margrave of Meissen, in 1282. They had 16 children:

• Elizabeth (born c. 1282), married Frederick, Count of Beichlingen
• Otto (born c. 1283, died in or before 1309)
• Albert (born c. 1284, died after 1341), joined the Teutonic Order
• Adelaide (1285–1320), married King Henry I of Bohemia
• Facie (daughter; born c. 1286, died before or in 1312)
• Agnes, Abbess of Osterode (born c. 1287, died between 1332 and 1336)
• Henry (born c. 1289, died before or in 1351)
• Frederick (c. 1291 – c. 1323)
• Adelheid of Brunswick (c. 1293 – 17 August 1324), married Andronikos III Palaiologos, Roman Emperor
• Conrad (c. 1294 – c. 1320)
• Mechtild (c. 1295 – between 24 October 1333 and 14 March 1344), married John II of Werle
• Ernest (c. 1297 – 11 March 1361)
• William (c. 1298–1360)
• Richardis, Abbess of Osterode (born c. 1300, died between 1332 and 1336)
• Margaret (born c. 1300, died in or after 1312)
• John, (born before 1322, died 23 May 1367), provost at Einbeck

Ancestry

Family of Henry I, Duke of Brunswick-Grubenhagen

16. Henry the Lion 8. William of Winchester, Lord of Lüneburg 17. Matilda of England 4. Otto I, Duke of Brunswick-Lüneburg 18. Valdemar I of Denmark 9. Helena of Denmark 19. Sophia of Minsk 2. Albert I, Duke of Brunswick-Lüneburg 20. Otto I, Margrave of Brandenburg 10. Albert II, Margrave of Brandenburg 5. Matilda of Brandenburg 22. Conrad II, Margrave of Lusatia 11. Matilda of Lusatia 23. Elisabeth of Greater Poland 1. Henry I, Duke of Brunswick-Lüneburg 24. Boniface I, Marquess of Montferrat 12. William VI, Marquess of Montferrat 25. Helena del Bosco 6. Boniface II, Marquess of Montferrat 26. Bonifacio di Clavesana, Count of Cortemiglia 13. Berta di Clavesana 3. Adelheid of Montferrat 28. Thomas I, Count of Savoy 14. Amadeus IV, Count of Savoy 29. Margaret of Geneva 7. Margaret of Savoy 30. Hugh III, Duke of Burgundy 15. Anne of Burgundy 31. Beatrice of Albon

References

• Braunschweigisches Biographisches Lexikon, Appelhans 2006, ISBN 3-937664-46-7
• At the House of Welf site