Seven works by the Catalonian architect Antoni Gaudi make up a UNESCO World Heritage Site around Barcelona. Casa Batllo is one of the properties in the group. The building is locally referred to as the House of Bones because of its organic skeletal qualities, and figures prominently in celebrations held April 23 for St. George, the patron saint of Catalonia.
Casa Batllo: The House Of Bones

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The facade of Casa Batllo, by Catalan architect Antoni Gaudi, has an organic skeletal quality leading locals to refer to it as the House of Bones, in Barcelona.

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A close-up view of Casa Batllo's facade, which shows its skeletal quality, which has led locals to refer to the structure as House of Bones, in Barcelona.

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Catalonian architect Antoni Gaudi was hired by wealthy textile merchant Josep Batllo to refurbish the house in 1904. The double bench shown is a replica of the one Gaudi designed for the dining room.

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A large skylight illuminates the dark blue tiles of the upper floor of Casa Batllo, in Barcelona.