Barcelone est reputee pour son architecture, en particulier pour l'oeuvre exceptionnelle qu'a accompli Antoni Gaudi. Son oeuvre la plus connue est certainement l'eglise de la Sagrada Familia, immense mais toujours inachevee a ce jour. Elle est en construction permanente depuis 1882, et est financee par des donations privees. Aujourd'hui, on estime que l'eglise sera entierement finie en 2026.

Especially remarkable is the work of architect Antoni Gaudí, which can be seen throughout the city. His best known work is the immense but still unfinished church of the Sagrada Família, which has been under construction since 1882, and is still financed by private donations: as of 2007, completion is planned for 2026