The Sagrada Familia, also known as the Sagrada Familia, is Barcelona's most famous landmark, built in 1882, and Gaudi took over from 1883 until his death in 1926, leaving this unfinished architectural wonder to Barcelona. Gaudi's genius and architects' ingenuity have transformed this huge building into a gem of human civilization. This century-old unfinished church is now the most visited attraction in Barcelona.