Henry I, Duke of Brabant was a nobleman who ruled from 1183 until his death in 1235. He was the son of Godfrey III, Duke of Brabant and Margaret of Louvain. Henry played a significant role in the political landscape of the Low Countries during the Middle Ages, expanding his territory and influence. As Duke, Henry I was known for his efforts to strengthen the duchy and promote trade. He established Brussels as an important urban center and supported the development of local governance. His reign contributed to the growth of Brabant as a key region in medieval Europe.