BOB GIBBONS / SCIENCE PHOTO LIBRARY BOB GIBBONS / SCIENCE PHOTO LIBRARY
Chateau de Montsegur. View of the Chateau de Montsegur (Montsegur castle) in the Pyrenees, France. This former fortress were one of the last strongholds of the Cathars - a heretical Christian dualist movement that thrived in some areas of Southern Europe between the 12th and 14th centuries.
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