

Herzog zu Braunschweig und Lüneburg
Brunswick Cathedral
Otto I. (* 1. January 1204; † 9. June 1252 in Lüneburg) was a herzog zu Braunschweig und Lüneburg. He was 48 years old. He was married to Mathilde von Brandenburg. He had at least 7 children (4 sons and 3 daughters). He was buried at Brunswick Cathedral.