From island monasteries to design-savvy contemporary chapels, here are 20 cathedrals that should top your list of must-see sites in Europe https://on.natgeo.com/2BqOAho

From island monasteries to design-savvy contemporary chapels, here are 20 cathedrals that should top your list of must-see sites in Europe https://on.natgeo.com/2BqOAho 

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