The rooms are covered by acutely pointed vaults, the stones forming the sides of the vault being bevelled to the angle, and the apex being covered by capstones covering spaces of one to two feet.
It is, however, differentiated from them all by having hewn stones, capstones, tenons and sockets.
In Scandinavia, on the other hand, such dome-roofed chambers are unknown, and the construction of the chambers as a rule is megalithic, five or six monoliths supporting one or more capstones of enormous size.
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