Guilliaume de Montfort He fought in the First Crusade, but was killed there in battle on 27 August 1101. Guilliaume de Montfort Guilliaume de Montfort () (died 27 August 1101) was a French bishop, most notably the Bishop of Paris from 1095 to 1101. Montfort's date of birth is not known, but it was some time before the death of his father, Simon I de Montfort in 1087. He was Bishop of Yves some time before becoming the Bishop of Paris. In 1095, Pope Urban II held the Council of Clermont at Clermont-Ferrand, France. It excommunicated Philip I of France and Bertrade de
Philip I of France with Bertrade de Montfort, the wife of Fulk IV, Count of Anjou. He repudiated Bertha (claiming she was too fat) and married Bertrade on 15 May 1092. In 1094, he was excommunicated by Hugh of Die, for the first time; after a long silence, Pope Urban II repeated the excommunication at the Council of Clermont in November 1095. Several times the ban was lifted as Philip promised to part with Bertrade, but he always returned to her, but in 1104 Philip made a public penance and must have kept his involvement with Bertrade discreet. In France, the king was opposed