The twisted edifice of Sagrada Familia is famous all over the world, but for something so well-loved it's not exactly finished. Its construction was stopped for decades following damage in the Spanish Civil War, but that's not the only reason for the delay.
Gaudí's designs for the Sagrada Familia were incredibly complex. His plans included a multitude of multi-faceted structures and mathematical equations, many of which were tough to conceptualize in his lifetime. It's only now, through advancements in construction technology, that his plans can be made a reality.
When it's finally finished in 2026, (which will mark the 100th anniversary of Gaudí’s death) your Sagrada Familia tickets will buy you entrance to the largest and most complete example of Catalan Modernisme. It will also be the tallest religious building in Europe.