"The station is superb and looks like a Palais des beaux-arts..." wrote the painter Edouard Detaille in 1900. Eighty-six years later, his prophecy was fulfilled.
The transformation of the station into a museum was accomplished by ACT architecture group, made up of M. Bardon, M. Colboc and M. Philippon. Their project was chosen in 1979 out of six propositions, and would respect Laloux's architecture while nonetheless reinterpreting it according to its new function. The project highlighted the great hall, using it as the main artery of the visit, and transformed the magnificent glass awning into the museum's entrance.
The museum has been organised on three levels: on the ground floor, galleries are distributed on either side of the central nave, which is overlooked by the terraces of the median level, these in turn opening up into additional exhibition galleries. The top floor is installed above the lobby, which covers the length of the Quai, and continues into the highest elevations of the former hotel, over the rue de la Légion d'Honneur (formerly rue de Bellechasse).
The museum's specific exhibition spaces and different facilities are distributed throughout the three levels: the pavilion Amont, the glass walkway of the former station's western pinion, the museum restaurant (installed in the dining hall of the former hotel), the Café des Hauteurs, the bookshop and the auditorium.