One of the most fascinating facts about Casa Batlló is that Antoni Gaudí did not build it from scratch; he radically transformed an existing building between 1904 and 1906. The original conventional structure, built in 1877 by one of Gaudí's own architecture professors, Emilio Sala Cortés, was completely reimagined, resulting in the iconic masterpiece that stands today on Passeig de Gràcia.
The Story Behind the Façade
The exterior of Casa Batlló is a canvas of symbolism and legend. Far from being just a colourful mosaic, it tells one of Catalonia's most cherished stories and showcases Gaudí's obsession with natural forms. The building is not merely architecture; it's a narrative built in stone, ceramic, and iron.
1. A Dragon on the Roof
The most popular interpretation of Casa Batlló's design is the legend of Saint George (Sant Jordi), the patron saint of Catalonia. The spectacular arched roof is covered in large, iridescent scales, representing the back of a dragon. The small turret topped with a four-armed cross is said to symbolize the hilt of Saint George's lance plunged into the beast's back, saving the princess and the townspeople.
2. The ‘House of Bones’
Casa Batlló has earned the local nickname Casa dels ossos, or the "House of Bones." This is due to its visceral, skeletal appearance. The slender stone columns on the lower floors resemble bones, and the distinctive balconies are often interpreted as skulls or masks. These skeletal features are thought to represent the victims of the dragon from the Saint George legend.
3. It Was a Remodel, Not a New Build
The textile industrialist Josep Batlló purchased the building in 1903. His initial plan was to demolish the unremarkable 1877 structure and start over. However, Gaudí convinced him that a radical renovation was all that was needed. Gaudí was given complete creative freedom for the project, which took place between 1904 and 1906.
Innovative Design and Inspiration
Gaudí was a master of integrating nature, light, and functionality. His work on Casa Batlló went far beyond the façade, creating an interior environment that was decades ahead of its time.
4. Inspired by the Sea
Many observers, including the surrealist artist Salvador Dalí, have noted the strong marine inspiration throughout the house. The undulating façade, covered in a mosaic of broken ceramic tiles (a technique called trencadís), evokes the shimmering surface of a calm sea. Inside, the swirling ceilings and the shades of blue used in the light well create the feeling of being in an underwater grotto.
5. Not a Single Straight Line
True to his belief that “the straight line belongs to men, the curved one to God,” Gaudí almost completely avoided straight lines in his redesign of Casa Batlló. From the wavy exterior to the curved walls, flowing staircases, and custom-made furniture inside, every element embraces organic, natural forms.
6. A Genius Use of Light
To illuminate the entire building, Gaudí expanded the central light well, or patio de luces. He covered the walls in ceramic tiles of varying shades of blue—darker at the top where light is plentiful and gradually becoming lighter towards the bottom. This clever gradient ensures a uniform distribution of natural light throughout the building's core.
Hidden Details and History
The house holds many more secrets, from its place in a famous architectural rivalry to its long journey to becoming a public museum.
- 7. The Block of Discord: Casa Batlló is a key building on a city block known as the Illa de la Discòrdia (Block of Discord). This name refers to the intense professional rivalry between Barcelona's three most famous Modernista architects—Gaudí, Lluís Domènech i Montaner, and Josep Puig i Cadafalch—whose radically different buildings stand side-by-side.
- 8. A Home and Rental Property: While the Batlló family resided on the grand main floor (the Noble Floor), Gaudí also designed the other apartments in the building for rent. This dual-purpose design was a practical reflection of the bourgeois lifestyle of the era.
- 9. UNESCO World Heritage Site: In 2005, Casa Batlló was inscribed as a UNESCO World Heritage Site, as part of the "Works of Antoni Gaudí," recognizing its outstanding universal value.
- 10. Over 1 Million Visitors a Year: The house opened its doors to the public for cultural visits in 2002, coinciding with the International Year of Gaudí. Today, it is one of Barcelona's most popular attractions, welcoming over 1 million visitors annually.
Frequently asked questions
What is the nickname for Casa Batlló?
Casa Batlló is widely known by several nicknames, most famously Casa dels ossos (House of Bones) due to its skeletal columns and skull-like balconies. It is also called the "House of the Dragon" because its roof resembles a dragon's back.
Who owns Casa Batlló today?
The Batlló family sold the house in the 1950s. Since 1993, the building has been owned by the Bernat family, founders of the Chupa Chups lollipop company, who have fully restored the house and opened it to the public.
Did Gaudí design the furniture in Casa Batlló?
Yes, as part of his vision for a "total work of art," Antoni Gaudí designed the furniture for the main floor specifically to complement the building's flowing, organic interior architecture.
Ready to witness these fascinating details for yourself? You can book tickets online to explore the magical world of Casa Batlló and see Gaudí's genius up close.