Paris, OCT 22 (AP/UNB) — Much about Leonardo Da Vinci remains an enigma: the smile of the "Mona Lisa"; why the world's most famous painter left so many works unfinished; and more recently, who bought the contentious "Salvator Mundi."

Lievin, Oct 8 (AP/UNB) — The Louvre has opened a new art conservation center some 200 kilometers (120 miles) from Paris to protect the museum's priceless artworks from its flood-prone reserves.