In December 2000, the National Gallery announced it suspected approximately 100 works from its collection was plunder stolen by the Nazis during the Second World War.[17] The gallery posted images of works suspected of being stolen art online, permitting its last legal owners to examine and possibly lay claim to the works.[17][18] In 2006, the museum restituted a painting by Édouard Vuillard that had been looted by the Nazis from Alfred Lindon in 1942, The Salon of Madame Aron, to Lindon's heirs.[19]