The only monuments which witnessed the events of the first half of the 13th century , and therefore the only ones which can claim the description `` Cathar '' , given that the Cathar Church never built anything , are the small castles , often totally unknown to the public , whose meager ruins are away from the tourist routes .
For this reason , the only ones which can claim the description `` Cathar '' are the small castles , often totally unknown to the public .