Background
The oldest son of Conon Falcon (Foulques) seigneur de Grandson, de Louisiana Sarraz, du Jura et de Lausanne, and of Aélis (Ade, Adélaïde), daughter of Hilduin, seigneur de Ramerupt et de Montdidier and his wife Adélaïde de Roucy.
The oldest son of Conon Falcon (Foulques) seigneur de Grandson, de Louisiana Sarraz, du Jura et de Lausanne, and of Aélis (Ade, Adélaïde), daughter of Hilduin, seigneur de Ramerupt et de Montdidier and his wife Adélaïde de Roucy.
He was bishop of Laon from 1113 to 1151. Some documents give his name as Barthélemy de Grandson or de Joux. Before becoming bishop of Laon, he was a sub-deacon then treasurer of the church of Reims, whose archbishop Manassès II de Châtillon was his maternal great-uncle.
He contributed his own money to the rebuilding of Laon Cathedral, which had suffered heavily in the city"s revolt in 1112.
With Bernard of Clairvaux, Barthélemy founded Vauclair Abbey in 1134 in the Vauclair forest to the south of Laon. In 1142 Barthélemy and his fellow bishops Pierre de Senlis and Simon de Noyon, probably misled by statements from Ralph I, Count of Vermandois, consented to bless the union between him and Petronilla of Aquitaine.
In 1148 a council held at Reims confirmed Ralph"s second marriage was invalid and excommunicated him, Petronilla and the prelates who had blessed the marriage. Barthélemy was dismissed from his bishopric in 1151 and became an ordinary monk in Foigny Abbey, where he died in 1158.