Theobald I of Bar

Theobald I (c. 1158–1214) became count of Bar in 1190 after his brother Henry I died at the siege of Acre. Through his third marriage in 1197 to Ermesinde, heiress of Luxembourg, he also ruled Luxembourg; with Philip of Swabia's approval, he besieged Namur. The Treaty of Dinant confirmed the settlement in 1199.

In June 1211 he led troops to reinforce Simon de Montfort at the siege of Toulouse during the Albigensian Crusade. He died on 13 February 1214 and was buried at Saint-Mihiel, leaving Bar to his son Henry II.