When he retired as the chief security officer of New York City’s Metropolitan Museum of Art, John Barelli had spent the better part of forty years responsible not only for one of the richest treasure troves on the planet, but the museum’s staff, the millions of visitors, as well as American presidents, royalty, and heads of state from around the world.For the first time, John Barelli shares his experiences of the crimes that occurred on his watch; the investigations that captured thieves and recovered artwork; the lessons he learned and shared with law enforcement professionals in the United States and abroad; the accidents and near misses; and a few mysteries that were sadly never solved. He takes readers behind the scenes at the Met, introduces curators and administrators, walks the empty corridors after hours, and shares what it’s like to get the call that an ancient masterpiece has gone missing. The Metropolitan Museum covers twelve acres in the heart of Manhattan and is filled with five thousand years of work by history’s great artists known and unknown: Goya, da Vinci, Rembrandt, Warhol, Pollack, Egyptian mummies, Babylonian treasures, Colonial crafts, and Greek vases.