Theobald was son of
Odo II, Count of Blois and Ermengarde of Auvergne. Upon his father's death in 1037, Theobald inherited amongst others the counties of Blois,
Tours,
Chartres.
Châteaudun and
Sancerre, and also in
Champagne:
Château-Thierry,
Provins and
St. Florentin. His brother
Stephen inherited the counties of Meaux, Troyes and
Vitry-le-François. By 1044,
Geoffrey Martel, the Count of Anjou, was besieging Tours and Theobald responded by attempting to relieve the city. They met in battle at Nouy and Theobald was captured and had to give up the county of
Touraine in order to regain his freedom. From then on the centre of power for the House of Blois moved to Champagne. In 1054, Theobald recognized the
Holy Roman Emperor, Henry III as his
liege which precipitated a meeting at Ivois between Henry I and the emperor. Theobald found ways to become close to the royal court again and gained political influence and began calling himself, Count Palatine. ==Gains Champagne==