One of the world`s best-known paintings, the Mona Lisa (Right), and its "original" version. A Swiss-based art foundation said on Wednesday new proofs show both paintings were works of Italian master Leonardo da Vinci. (Source: China Daily)

　　One of the world`s best-known paintings, the Mona Lisa (Right), and its "original" version. A Swiss-based art foundation said on Wednesday new proofs show both paintings were works of Italian master Leonardo da Vinci. (Source: China Daily)

　　One of the world`s best-known paintings, the Mona Lisa (Right), and its "original" version. A Swiss-based art foundation said on Wednesday new proofs show both paintings were works of Italian master Leonardo da Vinci. (Source: China Daily)