The La Sagrada Familia is the most prominent Roman Catholic Church on the planet, and it is the most visited spot in Barcelona. The majestic building is the most famous masterpiece of Gaudi. Here are some intriguing facts about the Church. The La Sagrada Familia’s construction started in 1882, and it will be completed in 2026. This means the whole building will take a total of 144 years to build from start to finish. Also, the church will take five times more the total time it took to make the pyramid of Gaza. Click the next ARROW to see the next photo!