Titian's Diana and Callisto in a handout photo released to Reuters Aug. 28, 2008. Two of Britain's leading art institutions are to join forces to take advantage of a cut price offer to save for the nation two works by Italian Renaissance master Titian. The two paintings -- Diana and Actaeon and Diana and Callisto -- are being offered by the Duke of Sutherland to the National Galleries of Scotland and the National Gallery of London at 50 million pounds (91.6 million U.S. dollars) each -- one third of their estimated open market value.