A council, usually called the Synod of St-Basle, was convoked at Reims by King Hugues Capet, assisted by Gerbert of Aurillac, later Pope Sylvester II, to consider the case of Arnulf, Archbishop of Reims, illegitimate son of the late King Lothair. Arnulf was accused of conspiring with his uncle, Charles, Duke of Lower Lorraine, against Hugh Capet. He was duly deposed by the council, and Gerbert appointed in his place. This was done without the approval of Pope John XV, who refused to accept either Arnulf's removal or Gerbert's appointment. The matter dragged on until 995 when Arnulf was restored, and was only completely resolved by Pope Gregory V in 997.