— Line 1, shortened to L1 and known as "Hospital de Bellvitge - Fondo", coloured red and often simply called Línia vermella ("Red Line"), is the second oldest metro line in Barcelona, after L3. It is operated by Transports Metropolitans de Barcelona (TMB). It appeared as a means to join the rail stations the city had in the 1920s. It has been growing since then to become, as of 2007, a large line made up of 30 stations, the network's busiest. These stations are architecturally homogenous, and as in the case of most metro lines in Barcelona, ornamentation is virtually absent from them. Some of them are improving their artificial lighting.
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