Apr. 18, 2012 - Titian's ''Bacchus and Ariadne'' to be Restored : Mr. Arthur Lucas is probably the world's supreme expert in the field of restring paintings. and to him has been entrust the world's most controversial piece of restoration work, that of the National Gallery's celebrated but decaying £2 million Titian? ''Bacchus and Ariadne''. For decades the controversy had gone on. Should, as the anti - restorers have claimed, 'this delicate and miraculous canvas'' be kept from ''Controversial'' cleaning methods ?