Baldwin IV of Flanders, also known as Baldwin IV of Hainaut, was a medieval nobleman who ruled as Count of Flanders from 987 until his death in 1036. He was a member of the House of Flanders and played a significant role in the political landscape of northern France and the Low Countries during his reign. Baldwin IV was known for his efforts to strengthen the power of the countship and for his involvement in various regional conflicts. Baldwin IV was the son of Baldwin III of Flanders and Mathilde of Saxony. His reign was marked by the consolidation of Flanders' territories and the establishment of trade routes that contributed to the region's economic growth. He is remembered for his contributions to the development of Bruges and Ghent, which became important centers of commerce in medieval Europe.