Many people only know that Casa Batllo is Gaudi's famous work, but I didn’t know that this apartment is a building that Gaudi and Jorge Maria Jojore have renovated. The front design of the Casa Batllo is inspired by the story of St. George and the Dragon. On the roof of the apartment, the glazed corrugated tile, such as the back of the dragon, makes the cross on the dragon's ridge particularly dazzling. The appearance of the apartment facing the street is based on the bones of the victims. This fairy tale is a bit scary and weird. The main hall on the first floor is the most essential part of the whole house, and it is also the place where Casa Batllo lived. It is hard to imagine how avant-garde the Casa Batllo was a hundred years ago and he lived in such a strange house.