PALAZZO BARBERINI: Masterpieces by the great masters of Italian and foreign painting, including Raphael and Caravaggio, and 18th century works that had long been stored for lack of space are now on view. They include works by Batoni, Mengs, van Wittel, Canaletto and Carriera. Follow the itinerary that ends in the splendid Hall of Columns with the great fountain of Bacchus and naturalistic decorations that seem to reflect the adjacent gardens. This gem, which was hidden for over 50 years by the Circolo Ufficiali (military club), which used it as kitchens and for food storage, has been opened to the public after a fine restoration by Laura Cherubini.