Thibaut IV was a notable medieval figure who reigned as the Count of Champagne and Brie from 1253 until his death in 1270. He was born in 1201 and was a member of the House of Blois. Thibaut IV is remembered for his contributions to the development of the region, including promoting trade and culture. In addition to his role as a count, Thibaut IV was also a significant player in the politics of France during his time. He was involved in various military campaigns and alliances, particularly during the Crusades. His reign is marked by efforts to strengthen his territories and enhance their economic prosperity.