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When Gothic flying buttresses were used, aqueducts were sometimes cut into the buttress to divert water over the aisle walls. Gargoyles are usually elongated fantastical animals because their length determines how far water is directed from the wall. A trough is cut in the back of the gargoyle and rainwater typically exits through the open mouth.
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Architects often used multiple gargoyles on a building to divide the flow of rainwater off the roof to minimize potential damage from rainstorms. In architecture, and specifically Gothic architecture, a gargoyle ( / ˈ ɡ ɑːr ɡ ɔɪ l/) is a carved or formed grotesque : 6–8 with a spout designed to convey water from a roof and away from the side of a building, thereby preventing it from running down masonry walls and eroding the mortar between. Gargoyle of the Vasa Chapel at Wawel in Kraków, Poland
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