Palazzo Reale
Elaborately decorated with painted ceilings and grand staircases, this former royal palace close to the Duomo is almost worth a visit in itself; however, it also functions as one of Milan's major art galleries, with a focus on modern artists. Exhibitions have highlighted works by Picasso, Chagall, Warhol, Pollock, and Kandinsky. Check the website before you visit to see what's on; purchase tickets online in advance to save time in the queues, which are often long and chaotic.