Which Gaudí building has a rooftop that resembles the back of a dragon?

Casa Batlló is the Gaudí building whose rooftop resembles the back of a dragon.

The roof’s arched profile and overlapping ceramic tiles evoke a dragon’s spine and scales. A small triangular feature is often interpreted as the creature’s eye, while the colorful surface gives the roof a shimmering, almost reptilian appearance when viewed from the street or terrace.

Gaudí remodeled the existing house in 1904 for the industrialist Josep Batlló. The building’s flowing façade, bone-like columns, mask-shaped balconies, and vivid ceramic decoration helped earn it the local nickname Casa dels Ossos, or “House of Bones.” Its roof imagery is also commonly linked to the legend of Saint George, Catalonia’s patron saint, defeating a dragon.

The dragon interpretation is an informed visual reading rather than a simple label stated by the building’s formal name. Casa Batlló is sometimes confused with Casa Milà because both are major Gaudí works on Passeig de Gràcia, but Casa Milà is the building popularly called La Pedrera.