owns, thus turning the subway network, a massive transport medium, into an ideal diffusion agent. The lending of the facilities is absolutely free for the museum and institutions that wish to exhibit their activities or part of the historical or cultural patrimony they treasure”. Rolling stock Line D was originally served by Siemens-Schuckert Orenstein & Koppel rail rolling stock, and then by CAF cars. In 1999, cars from the Nagoya Municipal Subway were purchased second hand from Japan and used on the line. In 2001, numerous Alstom Metropolis 100 Series cars were purchased and built in Brazil and Argentina with the intention of incorporating them into Line A, however they were ultimately put into service on Line D where they remain to this day. More 100 Series cars were purchased up until 2009, making a total of 96 cars. The remaining Nagoya cars were moved to Line C in 2007 and replaced with the 100 Series cars and with Fiat-Materfer cars. To make the rolling stock more uniform, 24 more modern 300 Series Alstom Metropolis cars were ordered in 2013 to replace the Materfer cars on the line, which meant that the line was entirely composed of 120 Alstom cars. In September 2015, at a conference in Brazil, the head of SBASE gave a presentation in which the number of new cars to be purchased for the line was 84 instead of 30. By 2016, the final figure had been fixed at 60 new cars, which meant that the was composed of 156 Alstom Metropolis cars by 2017. Gallery References External links Subterráneos de Buenos Aires (Official Page) Metrovías S.A. Subte Operator (Official Page) Subterráneos de Buenos Aires, D Line System map Buenos Aires Underground Railway lines opened in 1937 Buenos Aires – Line D 1937 establishments in Argentina