Barcelona is the capital city of Catalonia in Spain and the country's 2nd largest city, with a population of 1.6 million. Barcelona has a Mediterranean climate. The Barri Gòtic (Catalan for "Gothic Quarter") is the centre of the old city of Barcelona. Many of the buildings date from medieval times, some from as far back as the Roman settlement of Barcelona. Catalan 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. As of 2007, completion is planned for 2026.