Tags: Noble.
Albert I of Brunswick-Grubenhagen (c. 1339 – probably 1383) was a Duke of Brunswick-Lüneburg and Prince of Brunswick-Grubenhagen-Salzderhelden. He reigned from 1361 until his death.Albert I was the eldest son of the Duke Ernest the elder of Grubenhagen and his wife Adelheid of Eberstein. In 1359 his father made him co-ruler. After his father’s death in 1361 he ruled the principality alone except for a few possessions at Osterode and Herzberg which he ceded to his brother Frederick.