In the mid-1960s, construction of the "Réseau Express Régional" (RER) began. The "Ligne de Vincennes" as far as Boissy-Saint-Léger was to become part of a high-speed métro and its first would be replaced with a new underground line. The last train departed the "Gare de la Bastille" at 00:50 on 15 December 1969, hauled by locomotive 141 TB 432. The "Gare de la Bastille" was the last terminus in Paris operated entirely by steam locomotives. Following closure, the station buildings became a concert and exhibition hall. A number of pop concerts were held there and in 1976, a major model railway exhibition. The station buildings were listed as being of historic importance but despite this, they were demolished in 1984 to make way for the Opéra Bastille. The long viaduct which formed the approach to the station survives. The former rail lines are now the "Promenade plantée", whilst the arches now form the "Viaduc des Arts", located alongside the Avenue de Daumesnil.