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The secret behind the Sagrada Familia's final towers: Stone, steel and 21st-century glue

An innovative modular construction system and 24 tonnes of structural adhesive have dramatically accelerated work on Gaudí's Sagrada Familia. More than 140 years after construction began, the Barcelona basilica is reaching one of the defining milestones in its extraordinary history.

READ MORE : http://www.euronews.com/2026/09/26/the-secret-behind-the-sagrada-familias-final-towers-stone-steel-and-21st-century-glue

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00:00There are projects that defy time, and then there is the Sagrada Familia.
00:05In the heart of Barcelona, Antony Gaudi's masterpiece is nearing completion
00:09after more than 140 years of construction,
00:13a miracle that coincides with the centennial of the brilliant architect's death.
00:19Using a modular system, a puzzle of stone and steel is assembled,
00:24held together by 24 metric tons of adhesive developed by Hinkle.
00:29Begoña Cantera, the engineer in charge of the project,
00:32points out that thanks to this adhesive, construction of the Sagrada Familia
00:37has been accelerated by about 50 years,
00:40a half-century's head start thanks to a reason that absorbs moisture,
00:45sea salt and subway vibrations without cracking.
00:48We've been working on the process of using an adhesive to join the stone,
00:54pero la piedra en la construcción de los paneles modulares que recibe su Sagrada Familia.
01:01Its mystique evokes an interior forest bathed in light from the stained-glass windows.
01:07The basilica also holds secrets that inspired everyone from the stormtroopers,
01:13the imperial soldiers of Star Wars, to Gaudi himself, who is also depicted on the facade.
01:18Although he never lived to see his masterpiece completed, he rests in its crypt for eternity.
01:24On the passion facade, you can see an unconventional depiction of Christ,
01:28whose head is a book, a gateway to knowledge.
01:31After Gaudi's death, a line of architects took up the torch.
01:35In recent years, led by Geordi Fowli,
01:38they have faced the greatest structural challenge, erecting the central towers.
01:42Faouli recalls that the master knew his work would be completed, using the technology of the future.
01:48We've built the central towers with the technique, which maybe for 75 years it was not possible,
01:55but now it is, of cutting large panels of steel with invisible bars in the interior.
02:02And this technique we will use in the campanaries of the fachada of the Gloria,
02:07and maybe also in some of the columns.
02:09The Tower of Jesus now crowns the sky at 172 metres,
02:14making the basilica the tallest church in the world.
02:18The Cielo of Barcelona has already been built.
02:20The Jesus Christ Tower, the highest of the sacred family,
02:22recently blessed by the Pope León XIV on his trip to Spain,
02:26is protected by the city of Condal.
02:27The great secret of the tower is not only the stone, but the chemistry.
02:30A innovative patent of loctite adhesive is the molecular link that unites these tons of structures.
02:35Engineering at the highest level applied to the art of Gaudi.
02:38Maria Muñoz Morillo, Barcelona, para Euronews.

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