Casa Batllo Casa Batllo is a house renovated by Gaudi between 1904 and 1906. Built in 1877, the original building was very different from what it is today. When it was purchased by Joseph Batllo, he asked Gaudi to add his impressive touch to the design. From the outside, Casa Batllo looks as if it was made from skulls and bones. The skulls are in fact balconies and the bones are supporting stone columns between the windows. These details have given the house the nickname, the House of Bones. Gaudi decorated the building with colors and shapes found in the sea. Indeed, the design of the green and blue tiles on the wall reminds people of the sea, while the curved window frames were inspired by ocean waves. The interior of the house is even more impressive. Everything is curved, including the walls, the ceilings, and the wooden doors. Because of the curves, the Batllo family could not fit their traditional, straight furniture against the curved surfaces. Thus, Gaudi had to design special furniture for the family.