The present invention relates to a tombstone (1) in order to cover an opening of a burial vault, with a rigid assembly which is movable to move from an open position in which the rigid assembly which is movable leaves free the opening in the burial vault to a closed position in which the rigid assembly of the movable closing the opening of the burial vault, the rigid assembly which is movable with a lower plate (3) and an edge (4) which is rigid, positioned and fixed by fixing means along a peripheral edge of the lower plate (3) a rigid.
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