The Basílica i Temple Expiatori de la Sagrada Família is a large unfinished Roman Catholic church in Barcelona, designed by Catalan architect Antoni Gaudí (1852–1926). Gaudí's work on the building is part of a UNESCO World Heritage Site, and in November 2010 Pope Benedict XVI consecrated and proclaimed it a minor basilica, as distinct from a cathedral, which must be the seat of a bishop.
In 1882, construction of Sagrada Família commenced under architect Francisco Paula de Villar. In 1883, when Villar resigned, Gaudí took over as chief architect, transforming the project with his architectural and engineering style, combining Gothic and curvilinear Art Nouveau forms. Gaudí devoted the remainder of his life to the project, and at the time of his death at age 73 in 1926, less than a quarter of the project was complete.
Relying solely on private donations, Sagrada Familia's construction progressed slowly and was interrupted by the Spanish Civil War, only to resume intermittent progress in the 1950s. Since commencing construction in 1882, advancements in technologies such as computer aided design and computerised numerical control (CNC) have enabled faster progress and construction passed the midpoint in 2010. However, some of the project's greatest challenges remain, including the construction of ten more spires, each symbolising an important Biblical figure in the New Testament. It is anticipated that the building could be completed by 2026—the centenary of Gaudí's death.
The basilica has a long history of dividing the citizens of Barcelona: over the initial possibility it might compete with Barcelona's cathedral, over Gaudí's design itself, over the possibility that work after Gaudí's death disregarded his design, and the 2007 proposal to build an underground tunnel of Spain's high-speed rail link to France which could disturb its stability. Describing Sagrada Família, art critic Rainer Zerbst said "it is probably impossible to find a church building anything like it in the entire history of art", and Paul Goldberger describes it as "the most extraordinary personal interpretation of Gothic architecture since the Middle Ages".