Paris is a paradise for the art lovers. Several great venues are exhibiting contemporary art: Fondation Louis Vuitton, Fondation Cartier pour l'Art Contemporain, Pinacothèque de Paris, and of course, the Grand Palais among them. Plan at least half a day for visiting art centers in Paris as the collections are immense. It might make sense to check opening hours for the galleries and exhibitions before you head there, as schedule is subject to change.
Consider visiting Philharmonie de Paris at Cité de la Musique, recently renovated music and art complex in Paris. Stunning architecture, interior design, acoustics are up to the highest standards.