Theobald I of Champagne was a notable medieval nobleman who ruled as Count of Champagne from 1201 until his death in 1253. He was born around 1201 and was a member of the House of Blois. Theobald was known for his efforts to strengthen the power and influence of his county, as well as for his involvement in the political affairs of France during a time of significant change. Throughout his reign, Theobald I played a crucial role in the Crusades and was involved in various alliances and conflicts with neighboring territories. His leadership helped to establish Champagne as an important region in medieval France, contributing to its economic and cultural development.