Henry III, Duke of Brabant, was a nobleman who ruled from 1261 until his death in 1267. He was a member of the House of Reginar and the son of Henry II, Duke of Brabant. His reign was marked by efforts to strengthen the duchy and maintain peace in the region. During his short rule, Henry III focused on consolidating power and managing the affairs of his territory. He was known for his diplomatic skills and worked to foster good relations with neighboring regions, including Flanders and Hainaut. His legacy continued through his descendants, who played significant roles in European history.