The Cathars or Albigensians (these are synonyms, the original reference being to the Cathars of the city of Albi in Southern France<ref>Müller</ref>), developed into an important neo-Gnostic and dualist Christian heresy in Europe between about 1150 and 1350, significant for its rejection of both state and orthodox catholic ecclesiastical authority. | The Cathars or Albigensians (these are synonyms, the original reference being to the Cathars of the city of Albi in Southern France<ref>Müller</ref>), developed into an important neo-Gnostic and dualist Christian heresy in Europe between about 1150 and 1350, significant for its rejection of both state and orthodox catholic ecclesiastical authority. |