More than 140 years after the start of its construction, the Basilica of the Sagrada Familia, Antoni Gaudí's masterpiece, is about to reach a new milestone with the inauguration of the Tower of Jesus Christ, which will become the highest point of the emblematic temple of Barcelona. However, the project still faces significant challenges, including the construction of the Glory Facade, a phase that could involve the demolition of homes and the displacement of thousands of residents. Report by Elise Gazengel for France 24.