Albert I, Duke of Brunswick

Albert I, called the Tall (1236–15 August 1279), was the eldest son of Otto the Child, Duke of Brunswick-Lüneburg, and Matilda of Brandenburg, succeeding his father in 1252. In 1260–1261 his troops fought the Danes in Schleswig for Queen Margaret Sambiria of Denmark, and in 1263 he intervened in the Thuringian Succession War in support of Sophie of Brabant.

In 1269 he divided the Welf lands with his brother John, and when John died in 1277 he became guardian of his young nephew Otto. He backed Ottokar II of Bohemia, defeated at the Marchfeld in 1278. Albert died in 1279 and was buried in Brunswick Cathedral.