Tumulus d'Er Grah

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The tumulus of Er Grah is a tumulus dated Neolithic located in the commune of Locmariaquer, in the French department of Morbihan. It is located on the same site of the megaliths of Locmariaquer as the broken Great Menhir of Er Grah and the Table des Marchand. This monument of exceptional size remained unknown until the excavations of 1991.