Built between 1455 and 1464, this was the first of Rome's great Renaissance palaces. For centuries it served as the embassy of the Venetian Republic, but it's most readily associated with Mussolini, who installed his office here in 1929, and famously made speeches from the balcony. Nowadays, it's home to the tranquil Museo Nazionale del Palazzo Venezia and its eclectic collection of Byzantine and early Renaissance paintings, furniture, ceramics, bronze figures, weaponry and armour.