Mona Lisa: A Real Hidden Code in Her Eyes Intrigue is usually focused on her enigmatic smile. However, when viewed under a microscope, historians in Italy have discovered that by magnifying the eyes of the "Mona Lisa" tiny numbers and letters can be seen.
The painting Girl with a Pearl Earring (Dutch: Het Meisje met de Parel). circa oil on canvas, is one of Dutch painter Johannes Vermeer's masterworks and uses a pearl earring for a focal point. The painting is kept in the Mauritshuis gallery in The Hague.