Tumulus de Château Bû

About

Château Bû is a megalithic building located in Saint-Just, in the French department of Ille-et-Vilaine, Brittany. It is a megalithic monument of a unique type in Europe: the original dolmen, dated Neolithic, was transformed, at the age of bronze, into a tumulus surmounted by menhirs where individual tombs were built.