Go back to Piazza Venezia, passing on your left the 15th century Palazzo Venezia (now a museum of art with an interesting collection of medieval religious paintings) from whose balcony Mussolini saluted passing troops, and head up Via del Corso. One of the first buildings on the left of the Corso is Palazzo Doria Pamphili, whose walls are covered with more than 400 paintings including works by Titian, Caravaggio, Carracci and Velasquez. Further up the Corso you'll see a signpost to the Fontana di Trevi. The fountain's spectacular tritons, gods and animals bursting out of the wall behind them were designed by Nicola Salvi in 1762; the water is supplied by an ancient canal built by Agrippa in the first century BC. Don't forget to throw a coin into the water if you want to make sure of a return to Rome.
