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The railway, one of the first to be planned in Portugal, was opened on 2 April 1887. The southern terminus was changed from Alcântara-Terra to Rossio, after the station was inaugurated in June 1891. The duplication works were completed on 20 January 1949, and during the 1950s, the line was electrified. New rolling stock was introduced in the 1990s. Quadruple-tracking between Benfica and Amadora had been completed by September 1999.
Reis, Francisco; Gomes, Rosa; Gomes, Gilberto (2006). Os Caminhos de Ferro Portugueses 1856-2006 (in Portuguese). Lisbon: CP - Comboios de Portugal e Público-Comunicação Social S. A. ISBN989-619-078-X.
