Wikipedia
Credentes
Credentes or Believers, were the ordinary followers of what became known as the Cathar or Albigensian movement, a heretical sect which flourished in western Europe during the 11th, 12th and 13th Centuries. Credentes constituted the main part of the Cathar community in the region. Although Catharism sprang up in Spain, the Rhineland, Flanders and Italy its main focus was in the southern region of France, particularly the area known as the Languedoc. Although pacifist in nature, Catharism drew the condemnation of the Catholic Church which, when persuasion failed, launched successive Crusades and instigated the Inquisition to destroy it.