Title: Geography of Spain
Content:  The most populous cities in Spain are Madrid (3.3 million), Barcelona (1.6 million), Valencia (790,000), and Seville (690,000; all data as of 2019).
Title: Metropolis
Content:  Spain has around 15 metropolitan areas with a population greater than 500,000 people. The largest is Madrid, located in the center of the Iberian peninsula and its the seat of the government and the monarch of Spain, with a metropolitan area of almost 7 million people surpassing the limits of its own autonomous community and making it one of the largest of Europe; Barcelona is the second largest city of Spain its metropolitan area comprise 5.5 million people with its limits surpassing its own province, other large cities are Valencia, and Sevilla.
Title: Bilbao
Content:  Bilbao (, also,  ; Bilbo ) is a city in northern Spain, the largest city in the province of Biscay and in the Basque Country as a whole. It is also the largest city proper in northern Spain. Bilbao is the tenth largest city in Spain, with a population of 345,141 as of 2015. The Bilbao metropolitan area has 1,037,847 inhabitants, making it one of the most populous metropolitan areas in northern Spain; with a population of 875,552 the comarca of Greater Bilbao is the fifth-largest urban area in Spain. Bilbao is also the main urban area in what is 
Title: Seville
Content:  Seville (Sevilla, Castilian Spanish, Andalusian Spanish (with yeísmo) ) is the capital and largest city of the Spanish autonomous community of Andalusia and the province of Seville. It is situated on the lower reaches of the River Guadalquivir, in the southwest of the Iberian Peninsula. Seville has a municipal population of about 690,000, and a metropolitan population of about 1.5 million, making it the largest city in Andalusia, the fourth-largest city in Spain and the 26th most populous municipality in the European Union. Its old town, with an area of 4 km², contains three UNESCO World Heritage Sites: the Alcázar palace complex, the Cathedral and the 
Title: Madrid
Content:  Madrid is the capital and most populous city of Spain. The city has almost 3.4 million inhabitants and a metropolitan area population of approximately 6.7 million. It is the second-largest city in the European Union (EU), surpassed only by Berlin in its administrative limits, and its monocentric metropolitan area is the second-largest in the EU, surpassed only by Paris. The municipality covers 604.3 km2 geographical area. Madrid lies on the River Manzanares in the central part of the Iberian Peninsula. Capital city of both Spain (almost without interruption since 1561) and the surrounding autonomous community of Madrid (since 1983), it is also the political, economic and cultural centre of the country. 
Title: Tourism in Spain
Content:   As a crossroads of several civilizations, Spain offers a number of historical cities and towns. Major destinations include Spain's two largest cities: Madrid and Barcelona, which stand as two of the leading city destinations in Europe. Both offer a matchless number of attractions and their importance in commerce, education, entertainment, media, fashion, science, sports and arts contribute to their status as two of the world's major global cities. Fifteen Spanish cities have been declared World Heritage Cities by the UNESCO: Alcalá de Henares, Ávila, Baeza, Cáceres, Córdoba, Cuenca, Ibiza, Mérida, Salamanca, San Cristóbal de La Laguna, Santiago de Compostela, Segovia, Tarragona, Toledo and Ubeda. As of October 2016, Spain has 45 total sites inscribed on the list, third only to Italy (51) and China (50). Of these 45 sites, 40 are cultural, 3 are natural, and 2 are mixed (meeting both cultural and natural criteria), as determined by the organization's selection criteria. Other first-class destinations are Seville, Granada, Santander, Oviedo, Gijón, Bilbao and San Sebastián. All of them with historical landmarks and a lively cultural agenda.
Title: Spain
Content:  British overseas territory of Gibraltar, to the south and east by the Mediterranean Sea; to the north by France, Andorra and the Bay of Biscay; and to the west by Portugal and the Atlantic Ocean. With an area of 505990 km2, Spain is the largest country in Southern Europe, the second-largest country in Western Europe and the European Union, and the fourth-largest country by area on the European continent. With a population exceeding 47.4 million, Spain is the sixth-most populous country in Europe, and the fourth-most populous country in the European Union. Spain's capital and largest city is Madrid; other major urban areas 
Title: List of mayors of the 50 largest cities in Spain
Content:  This is a list of mayors of the 50 largest cities in Spain, are ordered the estimated populations as of 2020. These 50 cities have a combined population of 17.5 million, or 37% of the national population. The breakdown of mayoral political parties is 28 from the Spanish Socialist Workers' Party or the Socialists' Party of Catalonia, 11 from the People's Party, 10 from local or regional political parties and 1 from Citizens.
Title: Barcelona
Content:  Barcelona is a city on the coast of northeastern Spain. It is the capital and largest city of the autonomous community of Catalonia, as well as the second most populous municipality of Spain. With a population of 1.6 million within city limits, its urban area extends to numerous neighbouring municipalities within the Province of Barcelona and is home to around 4.8 million people, making it the fifth most populous urban area in the European Union after Paris, the Ruhr area, Madrid, and Milan. It is one of the largest metropolises on the Mediterranean Sea, located on the coast between the mouths of the 
Title: Spain national football team
Content:  Spain does not have a designated national stadium. The capital city Madrid (Bernabéu and Metropolitano), Seville (Pizjuán, La Cartuja and Villamarín), Valencia (Mestalla and Orriols) and Barcelona (Camp Nou and Montjuïc), are the four Spanish cities that have hosted more than 15 national team matches, while also being home to the largest stadiums in the country. Other friendly matches, as well as qualifying fixtures against smaller opponents, are played in provincial stadia. The 2018 FIFA World Cup qualification campaign included matches at the Reino de León in León, Los Cármenes in Granada, El Molinón in Gijón, and the Rico Pérez in Alicante.

Question: what the largest city in spain?
Answer: Madrid.