The Albigensian Crusade or Cathar Crusade (1209–1229) was a 20-year military campaign initiated by Pope Innocent III to eliminate Catharism in Languedoc, in the south of France. The Crusade was prosecuted primarily by the French crown and promptly took on a political flavour, resulting in not only a significant reduction in the number of practising Cathars but also a realignment of the County of Toulouse, bringing it into the sphere of the French crown and diminishing the distinct regional culture and high level of influence of the Counts of Barcelona.