This is another example of Antoni Gaudi’s architectural genius on the rooftop of Casa Batllo in Barcelona, Spain. The arched roof design and complex chimneys are very typical examples of his designs being colourful and full of irregular lines. The arched roof has been likened to the back of a dragon or dinosaur. The local name for the building is Casa dels ossos (House of Bones), and indeed it does have a visceral, skeletal organic quality. It was originally designed for amiddle-class family and situated in a prosperous district of Barcelona.