Peter Paul Rubens' painting "Christ on the Cross," missing for over four centuries, was sold for $3.41 million at Osenat after being discovered in a private Paris townhouse.Scientific authentication by Nils Büttner from Centrum Rubenianum confirmed its authenticity and preservation, highlighting its unique depiction of Jesus Christ and Baroque style.The work had belonged to William-Adolphe Bouguereau before remaining hidden in his family and has now greatly exceeded auction value expectations.