Étienne de Bar

Étienne de Bar (died 1163), sometimes Stephen of Bar, was a French cardinal and nephew of Pope Calixtus II.

He was the son of Theodoric I, Count of Montbéliard and Ermentrude of Burgundy (1055–1105), the daughter of William I, Count of Burgundy. He was brought up at Vienne, under the supervision of his uncle, Guy de Bourgogne, Archbishop of Vienne. He was probably in his uncle's entourage when he was summoned to a conference by Pope Gelasius II at Cluny. The pope died on 29 January 1119, before Guy de Bourgogne could reach Cluny; but he arrived at Cluny on February 1, and was elected pope the next day, taking the name Calixtus II.