Movers prepare to hang Leonardo da Vinci's "Early Mona Lisa" painting ahead of its exhibition at The Arts House in Singapore in this file picture taken December 12, 2014. Researchers into the provenance of the painting dubbed the "Early Mona Lisa" reported on Monday they had identified an English noble who probably bought it in Italy in the late 18th century and a country house where it was found in 1911. [Photo/Agencies]