The Neolithic tombstones were erected 5000-2000 BC and are formed of massive blocks of stone. Two different types of monument exist: dolmens, in which a burial chamber capable of housing several corpses was created out of several huge stones, and menhirs which constitute a single great standing stone. There are several examples of dolmens and menhirs in the ‘Pays du Grand Bergeracois’ including : 

The White Dolmen at Nojals-et-Clottes. Listed as an Historical Monument, it is one of Périgord’s most magnificent dolmens. The chamber is made from great blocks of standing stone and covered with stone slabs.
The Peyre Negro Dolmen at Nojals-et-Clottes. Situated not far from the White Dolmen, it forms a large table in brown rock.