Castel Merle is a complex of ten prehistoric rock shelters in Sergeac, in the Dordogne department of France. It is close to the Lascaux rock art caves and is situated in the region which forms the Unesco World Heritage site Prehistoric Sites and Decorated Caves of the Vézère Valley, but is not officially a part of it. The finds in the shelters date to the Mousterian and Magdalenian periods, between 160,000 and 12,000 years ago. The most important of the ten shelters is the Reverdit rockshelter.