The Medieval Lantern
Way back in 1322 disaster struck Ely Cathedral when the Norman Central Tower collapsed, destroying the choir and other parts of the building. The sacristan, Alan of Walsingham, had responsibility for the cathedral, designed and had built the Octagon Lantern, one of the wonders of medieval engineering. The Lantern is 170 feet above the floor of the cathedral and is itself 142 feet high.
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