In Italian, the word "novecento" means "20th century,” and Milan's Museo del Novecento has an excellent collection of 20th century artwork.
The museum opened in 2010 in the Arengario Palace on Piazza del Duomo in central Milan, combining two extensive collections of modern and contemporary art. The current collection includes a large number of Italian artists, as well as international ones. Some of the noted artists whose work you can see at the Museo del Novecento include Modigliani, Picasso, Kandinsky, Mondrian, and Matisse.
The collection is displayed in chronological order, so you can watch art movements progress over time. The iconic painting by Pellizza da Volvedo of striking workers, "The Fourth Estate," is on display on the ground floor, which can be visited for free.
The Museo del Novecento is located right on the Piazza del Duomo, and it's open on Mondays from 2:30pm-7:30pm; Tuesday, Wednesday, Friday, and Sunday from 9:30am-7:30pm; and Thursday and Saturday from 9:30am-10:30pm. Admission is €10 for adults, with reduced price tickets for students and seniors, and free entry for children 12 and under.