Coimbra (, also US: , UK: , Portuguese: [kuˈĩbɾɐ] (listen) or [ˈkwĩbɾɐ]) is a city and a municipality in Portugal. The population of the municipality at the 2011 census was 143,397, in an area of 319.40 square kilometres (123.3 sq mi).
The second-largest urban area in Portugal outside Lisbon and Porto Metropolitan Areas after Braga, it is the largest city of the district of Coimbra and the Centro Region. About 460,000 people live in the Região de Coimbra, comprising 19 municipalities and extending into an area of 4,336 square kilometres (1,674 sq mi).
Among the many archaeological structures dating back to the Roman era, when Coimbra was the settlement of Aeminium, are its well-preserved aqueduct and cryptoporticus. Similarly, buildings from the period when Coimbra was the capital of Portugal (from 1131 to 1255) still remain. During the late Middle Ages, with its decline as the political centre of the Kingdom of Portugal, Coimbra began to evolve into a major cultural centre.