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,
Sagrada Família Rennie Mackintosh in Glasgow, Gaudí carried the Art Nouveau style far beyond its usual application as a surface decoration. While never intended to be a cathedral (seat of a bishop), the Sagrada Família was planned from the outset to be a cathedral-sized building. Its ground-plan has obvious links to earlier Spanish cathedrals such as Burgos Cathedral, León Cathedral and Seville Cathedral. In common with Catalan and many other European Gothic cathedrals, the Sagrada Família is short in comparison to its width, and has a great complexity of parts, which include double aisles, an ambulatory with a chevet of seven apsidal