Also:  | Dolmen | Menhir | Megalith | Tumulus |

A megalith is a large stone that has been used to construct a structure or monument, either alone or together with other stones [in other words, the stones used to make a dolmen]. Megalithic describes structures made of such large stones, utilizing an interlocking system without the use of mortar or cement [in other words, a dolmen is also a megalith].

The word 'megalith' is from the Ancient Greek, for "great" + "stone". Megalith also denotes an item consisting of rock(s) hewn in definite shapes for special purposes. It has been used to describe buildings built by people from many parts of the world living in many different periods. A variety of large stones are seen as megaliths, with the most widely known megaliths not being sepulchral.

The construction of these structures took place mainly in the Neolithic (though earlier Mesolithic examples are known) and continued into the Chalcolithic and Bronze Age. [Ages of Humankind ]

In France, important megalithic zones are situated in Brittany, Vendée, Quercy and in the south of France (Languedoc, Rouergue and Corsica). More than 10,000 dolmens and menhirs cover a large part of the country (west and south).

Thank you Wikipidia