Megastructures: The Sagrada Familia. How is a stone cathedral constructed in the twenty-first century?

When it is finished, the Sagrada Familia in Barcelona will be the tallest church in the world.  The first stone was laid 136 years ago but there is still more than a third of it to be built. No other building has been under construction for so long.  A new technological breakthrough has speeded up construction by a factor of ten and the site now has a new goal: to finish in 2026 to coincide with the centenary of the death of Gaudí.  Currently the six central towers are steadily rising.  Will it be finished on time?

Looking at the processes used today in the continuation of its construction, Megastructures: The Sagrada Familia reveals the challenge of building a stone cathedral in the 21st century in the middle of the urban environment that is central Barcelona, with the added difficulty of hundreds of daily visitors who come to admire Antoni Gaudí’s posthumous work.

This documentary, produced by Minoria Absoluta for National Geographic, will be screened in autumn 2018 in Spain and around the world on National Geographic’s network of channels in 172 countries and 43 languages.