Theobald IV, count of Champagne (died 1253)

Theobald I of Navarre

King of Navarre from 1234 to 1253

Theobald I, also called the Troubadour and the Posthumous, was Count of Champagne from birth and King of Navarre from 1234. He initiated the Barons' Crusade, was famous as a trouvère, and was the first Frenchman to rule Navarre.