Robert I of Flanders was a notable medieval ruler who reigned from 1071 to 1093. He was the son of Baldwin VI of Flanders and Adela of France, and he became the Count of Flanders after his father's death. Robert was known for his military prowess and played a significant role in the politics of northern France and the Low Countries. During his reign, Robert I supported the First Crusade, which aimed to reclaim the Holy Land from Muslim control. His leadership helped to strengthen the influence of Flanders in European affairs, and he was recognized for his efforts in promoting trade and economic development in the region.