Original sentence: Catharism existed throughout much of Western Europe, but its focus was in Languedoc and surrounding areas - Occitania - what is now southern France.The designation is misleading as Albi was one of many focal points of Catharism: the movement had no centre and is known to have flourished in areas that are now parts of Italy, Germany, Northern France and Spain as well as the Languedoc.The fundamental doctrine of the Cathars that Roman Catholics regarded as heretical was interpreting the 'resurrection' as a doctrine of 'Rebirth', as against a physical raising of a dead body from the grave
Edited sentence: It existed throughout much of Western Europe, but its focus was in Languedoc and surrounding areas - Occitania - what is now southern France.The designation is misleading (although Albi was one among several early focal points of Catharism): the movement had no centre and is known to have flourished in areas that are now parts of Italy, Germany, Northern France and Spain as well as the Languedoc.The fundamental doctrine of the Cathars which qualified Catharism as a heresy was the understanding of the Doctrine of 'resurrection' as a Doctrine of 'Rebirth', in opposition to the Christian doctrine of a physical raising of a dead body from the grave