Corbeled gallery in the walls of the citadel, Tiryns - a Mycenaean palace.Corbeled Vault (or gallery): A vault formed by the piling of rocks in horizontal courses, cantilevered inward until the 2 walls met in a pointed arch. No mortar is used, and the vault is held in place only by the weight of the blocks themselves, with smaller stones used as wedges. (Gardner)
