A type of Neolithic passage grave, found along the Atlantic coastlands of northwest Europe, which comprises two or more chambers set within a single mound. Dating mainly to the 4th and 3rd millennia bc, these structures are mainly elaborations of the simple passage grave tradition, although a few are so large as to be regarded as variations of the developed passage grave tradition. Multiple passage graves typically comprise a large round or rectangular mound of earth and stone, within which there is a series of stone‐built chambers each being accessible for the outside of the mound via a narrow passage. The chambers are usually round, square, rectangular, or polygonal in plan. In some cases the passages open from only one side of the mound; in other cases the openings are on opposite sides, or, more rarely, from all around the circumference of the mound. Burials, either by inhumation or cremation, were made in the chambers. One of the best‐known examples is at Barnenez in Brittany.