Theobald III of Blois

Theobald III (c. 1019–1089), also called Theobald I of Champagne, succeeded his father Odo II in 1037 as count of Blois, Meaux and Troyes. In 1044 he was defeated and captured at Nouy by Geoffrey Martel of Anjou, who freed him only in exchange for the county of Touraine.

Theobald used his nephew's involvement in the Norman invasion of England to strengthen his authority in Champagne. After his death at Épernay on 30 September 1089, following a fifty-two-year rule, King Philip I arranged the division of Blois and Champagne between his sons Stephen, Odo and Hugh.