On 21 August 1911 the Mona Lisa was stolen from the Louvre in Paris. It stayed missing for more than two years, and news coverage around the world turned a painting admired mainly by art lovers into one of the most famous images on Earth.
The thief was Vincenzo Peruggia, an Italian decorator who had worked briefly at the Louvre and helped make the painting's protective glass case. On a Monday, when the museum was closed, he walked in wearing the white smock of the staff, lifted the painting off its hooks, left the case and frame on a service stairway and slipped out through a service door. Nobody noticed until the next day. Police questioned the poet Guillaume Apollinaire and the painter Pablo Picasso, who were both cleared. Peruggia hid the panel in a trunk in his Paris lodgings for two years, then took it by train to Florence. In December 1913 he offered it to an art dealer, who brought in the director of the Uffizi Gallery, and Peruggia was arrested. He said he wanted to return it to Italy. The Mona Lisa was back in the Louvre on 4 January 1914.

