La Monnaie de Paris, the mint originally established in 864 by King Charles the Bald and functioning ever since, has been remodeled and opened to the public as a working museum devoted to monetary metallurgy through the ages. (150 artisans continue to work there on specially commissioned coins.) La Monnaie may soon face its first repatriation controversy, however: among its opening exhibits is the Treasure of Hué, looted by French forces from Vietnam’s imperial palace in 1886.