Basilica of the Sagrada Família

Gaudí devoted the final years of his life to the Sagrada Família, to the extent that, when he died in 1926, he was living in his workshop within the temple grounds and was buried in the crypt as a mark of recognition and tribute. This total commitment makes the building an exceptional work: a cathedral conceived in the 19th century and still under construction today. On 7 November 2010, the temple was consecrated as a Basilica by Pope Benedict XVI.

The architecture of the Sagrada Família

The architectural design of the Sagrada Família tells the Christian story through three monumental façades representing the main episodes in the life of Jesus Christ. It also includes a set of eighteen towers symbolising the twelve apostles, the four evangelists, the Virgin Mary and Jesus Christ. Within this ensemble, sculpture is not merely decorative but a visual language fully integrated into the architecture in the service of liturgical expression.

The Nativity Façade, the only one Gaudí lived to see completed, celebrates the birth of Jesus through an exuberant decoration inspired by nature. By contrast, the Passion Façade features a much more austere and geometric language to represent Christ's suffering and death. The Glory Façade is still under construction and will be dedicated to the Resurrection and eternal life. It is also intended to become the main entrance to the basilica.

From a construction perspective, the Sagrada Família is a true laboratory of structural innovation. Gaudí used hyperbolic paraboloids in the vaults, highly efficient geometric forms that create light yet resistant structures. To study how loads behaved, he relied on stereofunicular models and numerous plaster models, an experimental method that proved fundamental to the development of the project.

The 18 towers

The bell towers of the Sagrada Família are the temple's most recognisable features. Parabolic in shape and tapering towards the top, they emphasise the symbolic ascent towards God and are crowned with colourful trencadís mosaics. The first tower to be completed, dedicated to Saint Barnabas on the Nativity Façade, was finished in 1926 and is the only one Gaudí saw completed.

The central Tower of Jesus, standing 172.5 metres high, makes the Sagrada Família the tallest building in Barcelona and the tallest church in the world, respecting Gaudí's wish not to exceed the height of Montjuïc, “so as not to surpass the work of God”.

The interior of the Sagrada Família

The interior of the temple is one of the most innovative expressions of Gaudí's architecture. In the central nave, the architect drew inspiration from the growth of trees to design a system of branching columns which, rising from a central trunk, distribute structural loads efficiently and create the impression of a stone forest, producing a unique spatial experience. The columns are made from different types of stone, including Montjuïc stone, granite, basalt and porphyry, combining structural, symbolic and expressive purposes.

The importance of light and symbolism

The stained-glass windows of the Sagrada Família are an essential part of the temple's spiritual and architectural experience. In Gaudí's vision, light becomes an architectural material and a symbolic language, an expression of the sacred that transforms the interior into an ever-changing space throughout the day.

Through a carefully studied chromatic gradation, cool tones (blue, green and violet), associated with the light of dawn, dominate the Nativity Façade, while warm colours (reds, oranges and yellows), characteristic of the evening light and symbolising life's final stage, prevail on the Passion Façade.

The Sagrada Família: a living heritage of Gaudí's architecture

After Gaudí's death, responsibility for the works passed to his collaborators and successors, who have sought to remain faithful to the original project using models, plans and documentation.

Today, Gaudí's Sagrada Família is a universal symbol of Barcelona and a living testimony to architecture's ability to unite spirituality, technique and nature in an unprecedented work.

The crypt and the Nativity Façade have been listed as a Historic-Artistic Monument (BCIN category) since 1969 and have been included on the UNESCO World Heritage List since 2005 as part of the Works of Antoni Gaudí.

Why is the Sagrada Família still under construction?

The Sagrada Família remains under construction today for several reasons. Firstly, the project is funded mainly through private donations and ticket sales. Gaudí himself knew and accepted that it would be the work of several generations, always dependent on the available budget.

Secondly, the Spanish Civil War (1936–1939) led to the burning of the temple and Gaudí's workshop, which destroyed several original models and documents. This forced later architects to reinterpret his ideas while remaining faithful to the genius's original vision. Added to this is the enormous technical and construction complexity of a project of exceptional scale, requiring highly specialised architectural and engineering solutions.

Finally, although technological advances have recently accelerated the construction process, the completion of the Glory Façade remains dependent on its urban integration, as the planned design would require interventions in buildings surrounding the basilica.