No museum could ever put on a complete Vermeer exhibition. The problem isn't quantity: thus far, only 36 works have been definitively attributed to the 17th-century Dutch painter of domestic scenes and portraits, most famously Girl with a Pearl Earring. But they all hang in collections scattered around the world, not just in places like Amsterdam and The Hague but London, New York, Paris, and elsewhere besides. Some have become too fragile to travel, and one, The Concert, was stolen in 1990 and hasn't been seen since.