Construction of Sagrada Familia Expected to Be Complete by 'Centenary of Gaudi's Death'—But Is It Really True? As viral rumors swirl that Barcelona's iconic Sagrada Familia will finally be finished in 2026 for the 100th anniversary of architect Antoni Gaudi's death, fact-checkers clarify: the main tower is on track, but final details (including the massive staircase and surrounding plaza) remain a decade away, making the 'full completion' claim misleading.