Recent disocvery of lost Leonardo painting prompts speculation . True identity of ` the History of Art lay dormant for years until research confirmed it was a Leonardo da Vinci . Though the conservator who helped to reveal the painting 's true identity called it `` the rarest thing imaginable , '' speculation is rife that there are other Leonardo da Vinci paintings still at large , possibly lying unknown in private collections . Scholars believe there may be five paintings in the world , and possibly more drawings . Once authenticated , paintings leap in value by about $ 125 .
Recent disocvery of lost Leonardo painting prompts speculation . True identity of ` the History of Art lay dormant for years until research confirmed it was a Leonardo da Vinci . Scholars believe there may be five paintings in the world , and possibly more drawings . Once authenticated , paintings leap in value by about $ 125 .