At the beginning of the 20th century, the ‘Mona Lisa’ was protected by a small pane of glass under its frame. In 1911, the painting was stolen by the worker who had framed it. It was recovered in 1913. Since the major renovation of the ‘Salle des Etats’ in 2005, the ‘Mona Lisa’ has been smiling behind a glare-free glass pane. A wise precaution, because in 2009, a visitor threw a cup violently into the window. The ‘Mona Lisa’ is lit by LEDs specially designed by Toshiba to minimise ultraviolet light. It is hung in a humidity and temperature controlled cabinet. The painting, painted on fairly thin poplar wood, shows cracking and signs of deformation.