Casa Milà, popularly known as ‘La Pedrera’ (the stone quarry), is a Modernist building in Barcelona, Spain. Designed by Antoni Gaudi, it is characterised by its organic-like undulating façade and surrealist sculptural roof.
Built between 1906 and 1910, Casa Milà was commissioned by the industrialist Pere Milà i Camps and his wife. It would be Gaudi’s last civil work and is considered to be one of his most adventurous and innovative designs. However, whereas he had planned it to be spiritually symbolic, clashes over the design meant many of his proposals were dropped, and at one point Gaudi had to be persuaded not to abandon the project.
In 1984, the building was included on the UNESCO World Heritage List and, having been extensively restored, it remains one of Barcelona’s most popular tourist attractions. It is currently the headquarters of the Catalunya-La Pedrera Foundation and contains a cultural centre.
Casa Milà was designed and built as two apartment blocks, nine storeys tall, linked by two large inner courtyards and a sinuous common façade. The different shapes and sizes of the courtyards give the layout the form of an asymmetric figure 8.
Gaudi’s structural innovations included the separation of the building into structure and skin. The façade, composed of large limestone blocks, is self-supporting, allowing the floor layouts to be free of load-bearing walls. Curved iron beams surrounding the perimeter of each floor connect the façade to the internal structure and provide load-bearing support. This innovation meant Gaudi could design the façade without traditional structural constraints, achieving a continuously curved, organic geometry.
The roofdeck rises and falls and is adorned with skylights, staircase exits, ventilation fans, and chimneys, all of which are designed as pieces of sculpture. They are constructed using brick covered with lime, broken marble and other ceramics, and were supposedly the source of inspiration for the helmets of Darth Vadar and his stormtroopers in ‘Star Wars’.
The attic is a clear space under a Catalan vault roof, supported by 270 parabolic brick arches of varying heights, spaced apart by about 80 cm. This spine-like rib structure creates the varied topography of the roofdeck.
The building was designated a historic and artistic monument in 1969, although by this time it had passed into new ownership and been allowed to deteriorate, including having been painted brown. In the late-1980s, it underwent a restoration process, with the façade being cleaning and restored.
The building’s roofdeck has been used in Michelangelo Antonioni’s 1975 film ‘The Passenger’, and Woody Allen’s film ‘Vicky Cristina Barcelona’.
 Related articles on Designing Buildings Wiki
- Antoni Gaudi.
- Building of the week series.
- Buildings in film.
- Guggenheim Museum, Bilbao.
- Neuschwanstein Castle.
- Sagrada Familia.
- Villa Savoye.
 External resources
Featured articles and news
Energy from waste and its key role in a low carbon economy.
Sir Ranulph Fiennes was guest speaker at the BSRIA Briefing - Tomorrow’s challenges in today’s buildings.
Read our introductory article to the Common Arrangement of Work Sections. What are they, what are the categories?
Acknowledging the unique requirements of projects in historic environments.
CIAT announces that Alex Naraian has been inaugurated as its new President.
Read our introductory article to the mechanical ventilation of buildings.
Do infrastructure professionals expect too much, or the wrong thing, from their sustainability colleagues?
Government announces new legal powers to give the North a say on how money is spent on transport.
If you are studying a built environment-related degree, we've got hundreds of articles designed to help you out.
Have a look at this lily-shaped building that has been awarded a low carbon certification by BREEAM.
What is dot and dab, and how can the typical defects be recognised and rectified?
How to get beyond the sales pitch and assess supplier sustainability.
Late payment has been a blight on the industry for decades - but what are the causes?