Was Nidaros Cathedral built from stone extracted in a large underground Medieval quarry?

Ancient underground building stone quarries are rather common. They are known since at least the Old Kingdom in Egypt, some 6 500 years ago, when fine limestone was quarried underground close to Cairo (Tura) in order to provide casing stones to the Giza pyramids. But underground quarries are, interestingly, quite rare in the European Middle…

Thousand-year-old cathedral surrenders its secrets, stone by stone

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Where does the stone at Nidaros Cathedral come from?

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Thousand-year-old cathedral surrenders its secrets

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