The Casa Batlló is a building by the architect Antoni Gaudí. Is one of the the highest representative of Catalan modernism. It is an integral remodeling of an existing by Emilio Sala Cortés. It is in the so-called Manzana de la discordia, because there are other houses in addition to this building of other modernist architects: the house Amatller, Casa Lleó Morera, Casa Mulleras and Casa Josefina Bonet Coquillat. The construction took place between 1904 and 1906.
Gaudí designed the project to remodel the Casa Batlló at age 52. by then he had already overcome the historicist styles of the 19th century, and his architectural style had transcended to reflect a personal vision of architecture, of great originality and innovation. However, in Gaudi’s works, the design of the whole does not deprive the building concept of functionality. In this sense, it is important to highlight the importance given to both lighting and ventilation. To this end, a large central courtyard was set up in the center of the building, which was ventilation to the service rooms. While the living rooms and bedrooms overlooked the façade