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Construction of the Sagrada Familia church in Barcelona began in 1882 and the building is still unfinished.

It was designed by Catalan architect Antoni Gaudi but by the time of his death in 1926, it was only one quarter complete.

The project which relies on private donations has developed slowly ever since and it is hoped the church will be completed by 2026.

And as 麻豆官网首页入口 Click's Spencer Kelly discovered the 21st Century technology of 3D printing was now playing a crucial role in ensuring this 19th Century project will be completed.