Unfinished building is Antoni Gaudí's Sagrada Família in Barcelona, a church that has been under construction since 1882, and that is now expected to be complete in 2026. There are numerous unfinished buildings that remain partially constructed in countries around the world, some of which can be used in their incomplete state but with others remaining as a mere shell. Some projects are intentionally left with an unfinished appearance, particularly the follies of the late 16th to 18th century. Some buildings are in a cycle of near-perpetual construction, with work lasting for decades or even centuries. Antoni Gaudí's Sagrada Família in Barcelona,
Catholic Church in Spain spreading Christianity. The Spanish Church oversees one of the greatest repositories of religious architecture (and art) in the world, among them the outstanding cathedrals of Cordoba (a former mosque), Santiago de Compostela, Burgos, León, Seville, Toledo and the Cathedral-Basilica of Our Lady of the Pillar in Zaragoza. There are also magnificent monasteries like San Millán and Silos in La Rioja, Monstserrat and Poblet in Catalonia, El Escorial and El Paular in Madrid, San Juan de los Reyes in Castile-La Mancha, the Abbey of Santa María la Real de Las Huelgas in Castile and Leon, or churches like Sagrada Familia in