Considered as the prelude to Casa Milà (La Pedrera), Casa Batlló is a wonderful and colourful house on Passeig de Gracia, designed by the famous architect Antoni Gaudi. The colours and shapes used in this work were inspired by marine life, such as the façade which is reminiscent of natural coral. Some people say it looks like it is made from skulls and bones, with the balconies being skulls and the supporting pillars being the bones.

The wealthy aristocrat Josep Batlló commissioned Gaudi to design the building. He lived in the two lower floors with his family, and rented out the apartments on the upper floors.
The attention to detail in this building is breathtaking. Apart from the initial decorative features, there are excellent architectural decisions such as varying the sizes of window depending on it´s position and floor, to allow maximum light into the room. It has been said the architect Josep Maria Jujol, a colleage of Gaudi, was responsible for the glass and ceramic work in this building, though evidence is not clear. Jujol also contributed to La Pedrera and Parc Guell some years later.