TL;DR: The Sagrada Família has been under construction for over 140 years, is funded entirely by ticket sales, contains 18 towers representing sacred figures, deploys structural geometry found nowhere else in architecture, and was designed by an architect who was almost unrecognisable when struck by a tram because he dressed like a pauper. Here are 25 facts that make the building even more extraordinary than it looks.
25 Facts About the Sagrada Família
1. Construction started in 1882 — and isn’t finished yet
The first stone was laid on 19 March 1882. Work is still ongoing in 2025. The building has been under construction for over 143 years, making it one of the longest-running active construction projects in modern history.
2. It’s entirely funded by ticket sales
The Sagrada Família receives no government subsidy and no funding from the Catholic Church. Every euro of construction costs comes from admission tickets, merchandise, and donations. Over 4.5 million visitors per year generate the revenue that keeps the cranes moving.
3. Gaudí took over the project after the first architect resigned
The original architect, Francesc de Paula del Villar, began the crypt in 1882 in neo-Gothic style. He resigned after a year following a disagreement with the project’s sponsors. Gaudí, then 31, took over in 1883 and spent the next 43 years transforming the project entirely.
4. Gaudí lived on the construction site for the last 15 years of his life
From around 1911, Gaudí moved into a workshop on the Sagrada Família site. He ate almost nothing, wore worn-out clothes, and devoted himself entirely to the project. By the time of his death, many Barcelona residents did not recognise him.
5. Gaudí was struck by a tram and initially taken for a beggar
On 7 June 1926, Gaudí was hit by a tram on Carrer de Gràcia. Because he carried no identification and was poorly dressed, he was taken to a pauper’s hospital. He was only identified as Barcelona’s greatest living architect several hours later. He died three days later, on 10 June 1926.
6. The central tower will be the tallest church tower ever built
The Jesus Tower — the central and tallest of the 18 towers — reaches 172.5 metres. This will make it the tallest church building in the world when complete, surpassing Ulm Minster (161.5m). Gaudí capped the height at 172.5 metres as a matter of religious principle: he refused to make human construction taller than Montjuïc hill (173m), which he considered part of God’s creation.
7. There are 18 towers, each representing a sacred figure
The 18 completed and planned towers represent: 12 Apostles (the smaller towers on the three facades), 4 Evangelists (Matthew, Mark, Luke, John — clustered around the central tower), the Virgin Mary (the second tallest, 138m), and Jesus Christ (the central tower, 172.5m).
8. The columns branch like trees — and it’s structurally necessary
Gaudí designed the interior columns to branch as they rise, distributing the roof load across multiple smaller support points rather than concentrating it at a few large capitals. This is not decoration — it is a structurally efficient system modelled on how trees distribute the weight of their canopy. The building has no flying buttresses as a result.
9. Gaudí designed the structure using hanging chain models
To calculate the parabolic arch profiles that carry the building’s weight most efficiently, Gaudí built inverted models using strings and small weights. When hung under gravity, the strings form perfect catenary curves. Inverted, these become the compression arches that carry loads without bending stress. The models are displayed in the museum.
10. The Nativity facade took over 30 years to complete
Gaudí worked on the Nativity facade from the 1890s until his death in 1926. It was the only major portion of the building he lived to see substantially complete. It contains over 100 individually modelled figures, each based on plaster casts of real people and animals.
11. Gaudí used real animals as models for the sculpture
The animals on the Nativity facade were cast from real specimens. Gaudí brought animals to the workshop and made plaster moulds of them. The tortoise at the base of the columns, the donkeys in the Nativity scene, and the pelicans in the portal were all modelled from life.
12. The Passion facade was deliberately made to look different
The Passion facade (west side) was designed by Gaudí to be angular, stark, and severe — deliberately contrasting with the organic richness of the Nativity side. After his death, sculptor Josep Maria Subirachs completed the facade in a style that was even more geometrically extreme than Gaudí intended, generating significant controversy.
13. The magic square on the Passion facade adds to 33
Subirachs carved a 4x4 number grid adjacent to the scene of Judas’s betrayal. Every row, column, diagonal, and 2x2 quadrant adds to 33 — the age of Christ at his crucifixion. Mathematicians have found over 310 ways to read 33 from the grid.
14. The stained glass was designed as a symbolic colour journey
The east-facing glass is blue and green (morning light, birth, life). The west-facing glass is red and amber (afternoon light, blood, sacrifice, death). The effect at different times of day is dramatic: the same nave looks completely different at 10:00 AM and 4:00 PM.
15. Gaudí’s original models were destroyed by anarchists in 1936
During the Spanish Civil War, in July 1936, anarchist militias burned the Sagrada Família workshop and destroyed most of Gaudí’s original plaster models, drawings, and documents. Reconstruction of the project required painstaking reassembly of thousands of plaster fragments over decades.
16. The fragments were reassembled like a jigsaw puzzle
After the fire, the workshop team collected fragments of the destroyed models from the ashes. Over subsequent decades, architects and craftspeople assembled these fragments — some as small as a thumbnail — to reconstruct Gaudí’s intentions. The partially reassembled models are displayed in the museum.
17. The building has no architect of record in the traditional sense
After Gaudí’s death, a succession of architects has continued the project: Domènec Sugrañes, Joan Rubió, Francesc de Paula Quintana, Isidre Puig Boada, Lluís Bonet Gari, Jordi Bonet i Armengol, and currently Jordi Faulí. Each has interpreted Gaudí’s intentions from models, drawings, and surviving elements.
18. Construction was completely halted during the Spanish Civil War
Building stopped entirely from 1936 to 1939. During this period the workshop was burned, the crypt was used as a storage space, and Gaudí’s tomb was reportedly desecrated. Work resumed in the 1950s and has continued without major interruption since.
19. Computer modelling transformed the construction speed
From the 1990s onward, the use of computer-aided design and digital stone-cutting dramatically accelerated construction. Elements that would have taken years to carve by hand are now precisely cut by CNC machines based on digital models. This is why the pace of construction has increased so visibly in the 21st century.
20. The Jesus tower was completed in 2021
The central tower of Jesus Christ, at 172.5 metres, was topped with its illuminated glass cross in December 2021. It became visible across Barcelona for the first time — a milestone that had been awaited for over 130 years.
21. The building generates its own microclimate
The stone facade, the depth of the interior, and the orientation of the windows create a natural temperature regulation inside. The building is consistently cooler than the external temperature in summer and significantly warmer in winter. This was deliberate — Gaudí considered the human comfort of worshippers as part of the architectural brief.
22. Gaudí is being considered for sainthood
A cause for beatification of Antoni Gaudí was formally opened by the Vatican in 2000. If successful, Gaudí would become the first architect to be declared a saint in the modern era. Supporters cite his extreme personal piety and his devotion to the building as evidence of exceptional holiness.
23. The building is earthquake resistant
The branching column system and the geometry of the parabolic arches make the building highly resistant to seismic activity. Barcelona is not a high-seismic zone, but the structural resilience was built in as a matter of engineering principle rather than local necessity.
24. It receives more visitors than the Eiffel Tower
In a typical pre-pandemic year, the Sagrada Família receives approximately 4.5–4.8 million visitors. The Eiffel Tower receives around 6–7 million but serves a much larger city and tourism market. For a building still under construction in a medium-sized European city, the visitor numbers are extraordinary.
25. The estimated completion date is around 2026
The centenary of Gaudí’s death (2026) has been cited as a symbolic target completion date. The major remaining element — the Glory facade, the main south-facing entrance — is currently under construction. “Complete” is a relative term: some elements of the sculptural programme may continue beyond 2026, but the building will be substantially finished.
Frequently Asked Questions
How old is the Sagrada Família?
Construction began in 1882, making the Sagrada Família over 143 years old. However, significant portions of the building — including the Evangelist towers, the central Jesus tower, and most of the interior stained glass — have been completed in the 21st century. The building represents both 19th-century ambition and 21st-century construction technology.
How long has the Sagrada Família been under construction?
The Sagrada Família has been under construction continuously (with interruptions during the Spanish Civil War, 1936–1939) for over 140 years. It is often cited as the longest active construction project in Europe.
How many people visit the Sagrada Família each year?
Approximately 4.5 million visitors per year in typical years, making it the most visited monument in Spain and one of the most visited in Europe. All visitors purchase timed-entry tickets, generating the revenue that funds ongoing construction.
When will the Sagrada Família be finished?
The building is expected to be substantially complete around 2026, the centenary of Gaudí’s death. The main remaining work is the Glory facade (south entrance). Some elements of the decorative programme may continue beyond 2026.
Who is buried at the Sagrada Família?
Antoni Gaudí is buried in the crypt of the Sagrada Família, in the Chapel of Our Lady of Mount Carmel. His tomb is accessible to visitors as part of the standard admission ticket. An expert guided tour is the best way to understand what you’re seeing.