The Albigenses
- http://www.newadvent.org/cathen/01267e.htm
- Text from the Catholic Encyclopedia about what the Roman Catholic Church regards as a neo-Manichean sect: the Cathars who flourished in what is now southern France in the twelfth and thirteenth centuries.
The Great Mysteries of the Languedoc
- http://www.cathar.info/
- Legends and theories concerning the Cathars of the Languedoc and their alleged links to Rennes-le-Chateau, the Knights Templar, the Holy Grail, the Ark of the Covenant, and the Da Vinci Code.