gargoyle

thumb|Gargoyles of Notre-Dame de Paris thumb|Dragon-headed gargoyle of the Tallinn Town Hall, [[Estonia]] thumb|Gargoyle of the Vasa Chapel at Wawel in [[Kraków, Poland]]

In architecture, and specifically Gothic architecture, a gargoyle () is a carved or formed grotesque 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. Architects often used multiple gargoyles on a building to divide the flow of rainwater off the roof to minimize potential damage from rainstorms. A trough is cut in the back of the gargoyle and rainwater typically exits through the open mouth. Gargoyles are usually elongated fantastical animals because their length determines how far water is directed from the wall. When Gothic flying buttresses were used, aqueducts were sometimes cut into the buttress to divert water over the aisle walls.