The Best Sight in Piazza Navona, Campo de' Fiori, and the Jewish Ghetto, Rome

Opulent, velvet-and-crystal salons in the Palazzo Primoli hauntingly capture the fragile charm of early-19th-century Rome and contain a specialized and rich collection of Napoléon memorabilia, including a bust by Canova of the general's sister, Pauline Borghese. You may well ask why this outpost of Napoléon is in Rome, but in 1798 the French emperor sent his troops to Rome, kidnapping Pope Pius VII and proclaiming his young son the King of Rome—though it all ultimately came to naught.