The venerable Biennale des Antiquaires, which takes place this September, will feature a special exhibition dedicated to the art of watchmaking. Presented by the Fondation de la Haute Horlogerie—an organization dedicated to promoting expertise and education in fine watchmaking—The Mastery of Time will chart the evolution of tools used to measure time, including sundials and more complicated mechanisms. The exhibition was previously on view at the Ambrosian Library in Milan.