Barcelona "modernista" architecture (related to the movement known as Art Nouveau in the rest of Europe) developed between 1885 and 1950 and left an important legacy in Barcelona. Several of these buildings are World Heritage Sites. 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. , completion is planned for 2026. Barcelona was also home to Mies van der Rohe's Barcelona Pavilion. Designed in 1929 for
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