But having arrived at the Renaissance, Hughes&rsquos writing undergoes its own zestful revival, and this is much the best part of the book, crammed with stories about artists and artworks. Enormously pleasurable, too, is Hughes&rsquos style, full of caustic phrases about Papal pretension and artistic excess, though I wish he had denounced Bernini&rsquos frightful baldacchino, or bronze canopy, over St Peter&rsquos tomb in his Roman basilica. In fact, he celebrates it, justifying the stripping of the roof and portico of the Pantheon to provide the bronze for this monstrosity (though the story may not be true, since Pope Urban stated that the Pantheon bronze was used for making cannon, and Bernini sourced his from Venice). But the story of the baldacchino is one of many that suggest how Rome, careless of the glories of her past, was constantly cannibalising them for its present and future. Hughes is also extremely good on the neoclassical period and the Grand Tour, chronicling the city&rsquos history as a site of sexual discovery for young aristocrats. Post-Renaissance, the book acquires a new strand, that of a history of modern cultural tourism, with Rome acting as a magnet for all kinds of journeys of self-discovery. I missed Henry James here, but there is a great deal else to compensate.