A Christie's employee looks at an oil painting by 17th century artist Charles Le Brun is on display at Christie's in New York, January 23, 2013. A major renovation at Paris's legendary Ritz hotel has resulted in the discovery of the painting that nobody knew was there. Now, the giant tableau is to be sold by Christie's auctioneers and could raise up to 500,000 euros ($665,000) for the foundation established by owner Mohamed Al Fayed in memory of his son Dodi, the late boyfriend of Princess Diana. The oil painting has been identified by experts as an early work by Le Brun (1619-1690) that would have been completed before he became the official painter at the court of Louis XIV and established his reputation as one of the dominant figures of 17th century French art. AFP PHOTO/Emmanuel Dunand 'MANDATORY MENTION OF THE ARTIST UPON PUBLICATION'