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On February 20th, 2026, just two days ago, workers lifted the final arm of a 17-meter cross into the

Barcelona sky. When it locked into place, the Sagrada Familia became the world's tallest church,

144 years after construction began. 144 years. That's how long this building has been under

construction. Workers laid the foundation stone in 1882, before the Eiffel Tower existed.

Before the first skyscraper. Before anyone had poured reinforced concrete.

The building has survived two world wars, a civil war that destroyed the construction plans,

a pandemic that halted work entirely, and technological revolutions that changed

how humans build. So what does it take to finish a construction project that's outlasted

empires? By mid-January 2026, workers had installed all four horizontal arms of the cross.

On February 20th, they installed the upper arm, bringing the tower to its highest point.

The structure is complete. The entire structure reaches 172.5 meters, taller than St. Peter's

Basilica in Rome and nearly twice the height of Big Ben in London. That final height

isn't arbitrary. Gaudi believed human creation shouldn't exceed God's work,

so he deliberately designed the tower to stand one meter shorter than Montjuïc hill,

Barcelona's highest natural point. The timing carries enormous significance.

2026 marks the centenary of Gaudi's death. The Sagrada Familia Foundation has planned a

year of commemorative events, starting with a solemn mass on June 10th and culminating in the

Nativity facade in December. Pope Leo XIV is expected to visit

during 2026. If confirmed, it will be the first papal visit since Pope Benedict XVI

consecrated the Basilica in November 2010. Construction began on the glory facade's

vertical walls in June 2025. Meanwhile, three artists are creating sculptures for the

Basilica. The story begins not with Gaudi, but with a bookseller.

Josep Maria Bocabella founded the Spiritual Association of Devotees of St. Joseph in 1866.

After visiting the Vatican in 1872, he returned to Barcelona determined to build a church

inspired by the Basilica at Loreto. On March 19th, 1882, workers laid the

foundation stone in Barcelona's example district. The first architect,

Francisco de Paula de Villar, designed a standard neo-Gothic church.

But de Villar resigned on March 18th, 1883, after disagreements with the project advisors.

The commission passed to a relatively unknown 31-year-old architect named Antoni Gaudi.

Gaudi threw out de Villar's conventional plans entirely. He envisioned something Barcelona

had never seen, a massive basilica with 18 towers representing the 12 apostles, the four

His inspiration came from nature. He studied trees, bones, mountains, and shells,

translating their organic forms into architecture. Columns branched like trees.

Towers spiraled upward like seashells. The basilica would tell the story of Christ

through three grand facades. The Nativity facade would celebrate birth and life.

The Passion facade would depict suffering and death. The Glory facade would represent

resurrection and eternal life. Gaudi knew he wouldn't live to see it finished.

He often said his client wasn't in a hurry. From 1883 until 1914,

Gaudi worked on multiple projects across Barcelona. But after 1914, he devoted himself

exclusively to Sagrada Familia. He moved into a workshop on site, spending 16-hour days

refining models and calculations. On November 30, 1925, Gaudi witnessed the

completion of the Tower of Barnabas. It was the only tower he ever saw finished.

By the time of his death, less than one-quarter of the basilica was complete.

But he had created detailed plaster models and calculations that would guide future

architects. Gaudi's final day was June 7,

1926. While crossing Gran Via de las Cortes Catalanes at Ballen Street,

Gaudi stepped back to avoid an approaching tram. He didn't hear or see a second tram

coming from the opposite direction. It struck him at 6.05 in the evening.

The 73-year-old architect fell, hitting his head on the pavement.

In his final years, Gaudi had lived austerely, wearing shabby clothes and focusing

entirely on his work. Passers-by mistook him for a beggar.

Taxi drivers refused to transport him. A police officer eventually took him to

Hospital de la Santa Cruz. The chaplain from Sagrada Familia didn't

recognize him until the next day. It was too late.

Gaudi died on June 10, 1926, 15 days before his 74th birthday.

Thousands of Barcelona residents lined the streets for his funeral procession.

He was buried in the Chapel of Our Lady of Mount Carmel in the crypt,

where his remains rest today. Construction continued under Dominic

Sugranes until July 20, 1936. Two days after the Spanish Civil War

members of the Federación Anaquista Iberica stormed the construction site.

They torched the workshop, destroyed Gaudi's models, burned drawings and

photographs and set fire to the crypt. They even smashed the lid of Gaudi's tomb.

The anarchists returned with dynamite, intending to destroy the nativity facade completely.

A government representative intervened at the last moment, saving the basilica from total destruction.

The loss was catastrophic. Most of Gaudi's detailed plans, models and notes were gone.

12 people connected to the construction project were killed during the Civil War.

Sugranes died in 1938 at age 59.

After the war ended in 1939, architect Francesc de Paula Quintana took over.

He spent a decade reconstructing what he could from surviving fragments,

published photographs and memory. Workers gathered thousands of pieces of smashed plaster

models, trying to reassemble them like puzzles. Then came another setback.

On April 19, 2011, an arsonist set fire to the sacristy, forcing the evacuation of 1,500

tourists. The fire burned for 45 minutes. A 65-year-old man with mental health issues

was arrested at the scene. COVID-19 brought construction to a halt on March 11, 2020.

For nearly four months, work stopped completely. The basilica reopened on July 4,

2020, but the pandemic's economic impact had severely reduced visitor numbers and funding.

Here's the core problem. Sagrada Familia has 36 interior columns supporting the roof,

each one unique, none straight. For comparison, Notre Dame Cathedral in Paris has just 10

primary columns. Each column starts as a geometric shape at the base,

hexagon, octagon or twelve-sided. As it rises, it twists and transforms.

A hexagonal column at the ground level becomes an octagon at mid-height,

then splits into branches near the ceiling. The twist rate varies. Some columns rotate 15

degrees over their height, some 30. These aren't decorative choices.

Gardie calculated load distribution through branching. One column at the crossing supports

the tower weight above, approximately 6,000 tons. Instead of channeling that force

straight down through a single massive pillar, the column branches into four smaller supports.

Each branch carries a fraction of the load, spreading stress across the foundation.

The geometry is hyperbolic paraboloid, the same shape you'd get if you twisted a square piece

of paper while pulling opposite corners. The stone surface curves in two directions

simultaneously. There are no flat faces to measure from, no right angles to reference.

When the Civil War destroyed Gardie's models in 1936, architects lost the exact

specifications for how each column should transform as it rises. Photographs showed

the overall shapes. Surviving plaster fragments gave clues, but the precise twist rates,

branch angles and connection points were gone. Francesc de Paula Quintana spent 10 years

after the war reconstructing what he could. Workers gathered thousands of pieces of smashed

models matching edges like jigsaw puzzles. But gaps remained. Entire columns with only

partial data. The breakthrough came in the 1980s when Mark Bory introduced software

designed for airplane wing analysis. The software could input the incomplete data from

Gardie's fragments, calculate the missing geometries and verify whether the reconstructed

shapes would actually hold the basilica's weight. But verifying the math didn't solve

the construction problem. Each column requires between 800 and 1200 individual stone blocks,

more pieces than a typical family home has brick, carved to fit together with millimetre

precision. The blocks must account for the column's twist, the surface curvature in two

directions and the exact angle where branches split. Human stone carvers working with

traditional tools would need months per column, and even then, errors accumulate.

That's why Dutch engineers built a CNC milling machine specifically for this project.

The machine receives the digital column geometry from Bory's calculations.

Then it cuts stone initially using a 4-axis, now 7-axis robotic arm, meaning it can rotate

and tilt the cutting bit in multiple directions simultaneously while moving across the stone

surface. The cutting precision is 0.1 millimetres. For comparison, human error with hand tools

typically falls within 2 to 3 millimetres. When you're stacking 1200 blocks over a 20-metre

column, those errors compound. A column off by 3 millimetres at the base will be off by

half a metre at the ceiling. The branches won't align, the vault won't connect.

The machine eliminates that error. It can cut a stone block's complex curved surface in six

hours, work that would take a master carver three weeks. More importantly, the 1200th block

fits exactly as precisely as the first. This is why completion is possible now when it wasn't

before. The combination of aeronautical stress analysis software and 5-axis CNC stone cutting

solve both the design verification problem and the construction precision problem.

Gaudi's vision required 21st century technology to execute. Not everyone celebrates the

approaching completion. The glory facade will include a grand staircase descending from the

main entrance. The original 1905 urban plan designated space for this staircase,

but over the decades the city built up around the basilica. Residential buildings now occupy

that space. Completing the staircase as designed requires demolishing buildings that house

approximately 1,000 families, affecting around 3,000 people, equivalent to displacing an entire

Barcelona neighbourhood the size of Gracia's Gothic Quarter. Residents filed lawsuits claiming

the staircase wasn't in Gaudi's original plans. They argue the construction board is inventing

justifications to expand the basilica's footprint. The Sagrada Familia Foundation

insists the staircase is essential. Gaudi's surviving drawings show it clearly. The

foundation argues that completing his vision requires temporary displacement, with affected

families receiving compensation and relocation assistance. In February 2025, chief architect

Jordi Faulli announced they would proceed despite protests. Some architected critics argue

that continuing construction betrays Gaudi's memory. They claim modern architects can't truly

interpret his fragmentary plans. Others counter that leaving it unfinished would betray Gaudi's

vision. The architect left detailed geometries and structural principles enough for successors

to work from. Leaving it unfinished would be the real betrayal. The basilica operates

as an expiratory temple, meaning it can't accept government money or bank loans. It relies

entirely on private donations and ticket sales. The neighbourhood around Sagrada Familia struggles

with over-tourism. Local shops have been replaced by souvenir stores. Residents complain

about noise, crowds and rising housing costs driven by short-term vacation rentals.

After 144 years of construction, the question isn't just when it will finish, it's why now?

For decades, completion seemed impossible. But modern technology solved what human hands couldn't.

CNC machines cutting complex stone, software verifying destroyed plans, and tourism funding

generating millions annually. These three breakthroughs made completion finally achievable.

Here's what completion actually means. There are three finish lines.

2026 marks the symbolic completion. The Tower of Jesus Christ, the central

spire that represents Gaudi's entire vision, will be blessed and finished. This is the

tower that makes Sagrada Familia the world's tallest church. It's the element Gaudi himself

designed to stand at the peak, representing Christ ascending to heaven.

When this tower is complete, Gaudi's spiritual and architectural vision is realized.

2033 marks the structural completion. All 18 towers will be built. The glory for

side walls will stand. The main vaults and roofs will be in place. This is when the

last major stone is laid, 151 years after construction began. The building skeleton

will be finished. And 2035 marks the decorative completion. The glory facade

sculptures, interior details and final ornamental work will be carved. This is when craftspeople

set down their tools for the last time. After the tower opens in 2026, the viewing

platform inside the cross will become accessible to visitors, probably in 2027.

Visitors will climb to 172 meters and look across Barcelona from the world's tallest church.

Architects, sculptors and craftspeople have dedicated entire careers to this building.

Some will retire having worked their whole lives on a structure their great grandparents

also helped build. When the last stone is placed, Sagrada Familia will transform

from a construction site into a completed monument. The cranes will come down, the

scaffolding will disappear. That moment will reveal whether modern architects truly captured

Gaudi's vision. It will show whether a century of different hands could create something unified.

And it will demonstrate whether a 19th century architect's dream can still inspire the 21st

century. Here's something to think about. In 2033, 151 years after Gaudi handed his first

sketches to stone carvers, the last piece will be placed. Not by him, not by anyone who

knew him. Now, those future generations are nearly done. Was Gaudi's vision worth the

century and a half wait? When you look at those towers reaching toward the sky,

covered in light-catching glass and ceramic, do you think he'd be satisfied

with what we've built in his name? Drop your thoughts in the comments. And if you want more