Henry I, Duke of Brunswick-Grubenhagen

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For other people of the same name, see Henry of Brunswick-Lüneburg.
Henry I, Duke of Brunswick-Grubenhagen
Spouse(s) Agnes of Meissen
Noble family House of Welf
Father Albert I, Duke of Brunswick-Lüneburg
Mother Adelheid of Montferrat
Born August 1267
Died 7 September 1322(1322-09-07)
Salzderhelden (today part of Einbeck)

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.


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



Henry I, Duke of Brunswick-Grubenhagen
Cadet branch of the House of Este
Born: August 1267 Died: 7 September 1322
German nobility
Preceded by
Albert I
Duke of Brunswick-Lüneburg
Princes of Wolfenbüttel
joint reign with Albert II and William I

Succeeded by
William I
Principality of Grubenhagen disentangled from the Principality of Wolfenbüttel Duke of Brunswick and Lüneburg
Prince of Grubenhagen

Succeeded by
Ernest I and Henry II