Italy is a leading industrial nation in Europe, which consists primarily of a long boot-shaped peninsula protruding into the Mediterranean Sea and two large islands, Sicily and Sardinia. Rome, the current capital, was the seat of the Roman Empire. Italy was allied with Germany and Japan in World War II, but switched sides to the Allies in 1943. Italy is currently a member of NATO and the European Union, and has the Euro as its currency. The prime minister of Italy is the media mogul Silvio Berlusconi.