Line C of the Buenos Aires Underground, that runs from Retiro to Constitución terminus, opened on 9 November 1934, and it has a length of . It runs under Lima Sur, Bernardo de Irigoyen, Carlos Pellegrini, Esmeralda, la Plaza San Martín and Avenida Ramos Mejia streets. It not only connects to every other line on the system (with the exception of Line H, which it is planned will be connected at a later date), but its termini at Retiro and Constitución also connect it to some of the most important commuter rail networks in Buenos Aires, such as the Mitre and Roca lines and also long-distance passenger services. It is thus an important artery in Buenos Aires' transport system. At the same time, it is also the shortest line in both terms of length and number of stations. It was the third line of the network to provide rail services to the public, after Line A and Line B. Up until 2007 with the opening of line H, it was the only line in the system providing a north–south service. History The line was constructed by the Compañía Hispano Argentina de Obras Públicas y Finanzas (CHADOPyF, Hispanic-Argentine Company for Public Works and Finances), headed by a Spanish nobleman, Rafael Benjumea, the Count of Guadalhorce. This company took on the task because the Great Depression of the 1930s meant that the Anglo-Argentine Tramways Company (which owned most of the then vast tram network in the city) pulled out of its construction. The line was subsequently opened in 1934 and extended from the present terminus at Constitución to Diagonal Norte in the centre of the city. The stretch from Diagonal Norte to its present terminus at Retiro was opened in 1936 and marked the last expansion of the line, which remains the only line not to be extended since then. On opening, the stations were decorated with murals depicting rural Spain created by Argentine artists Martín S. Noel and Manuel Escasani, as well as some stations reflecting Moorish influences and were painted with gold powder. It had advanced technology for the time, such as Automatic Train Stop (ATS). When Line E was opened in 1938, its original terminus was shared with that of Line C at Constitución. However, Line Es' route was altered in 1966 for the lines to meet instead at Independencia, where they still do so to this day. With