The Galleria d'Arte Moderna contains one of the finest collections of modern art in Italy, with about 45,000 works in its collections. 

The concentration is on Italian artists such as Modigliani, De Chirico, Carrà, De Pisis, and Guttuso, but the collections have a number of works by Renoir, Utrillo, Paul Klee, Max Ernst, Chagall, and others. 

The museum's slogan "All Art Has Been Contemporary" reminds viewers that works considered unconventional in their day (or brushed aside as inconsequential) are now staples of fine arts sought by the world's leading museums.