Retiro is a major terminus for transportation. Clustered together are a bus station (Terminal de Ómnibus de Retiro) and three train stations. The most impressive is Retiro Mitre. The design is Edwardian Baroque. This style was popular in the United Kingdom during the reign of King Edward VII (1901 – 1910). Much of the building was prefabricated in Liverpool, England, by British architects. The Retiro Mitre Railway Station was declared a National Monument in 1997.