The major project of President Georges Pompidou was the Centre Georges Pompidou in the Beaubourg area of the 4th arrondissement: it is an ultramodern showcase of the contemporary arts, whose pipes, escalators ducts and other internal workings were exposed outside of the building. Pompidou's successor, Valery Giscard d'Estaing, converted the Gare d'Orsay railway station into the Musée d'Orsay for art of the 19th century; it was opened in 1977 under President Mitterrand. He also replaced the old slaughterhouses at the Parc de la Villette with a new museum of science and technology, the Cité des Sciences et de l'Industrie (1986).