Adventures in the Louvre: How to Fall in Love with the World’s Greatest Museum. By Elaine Sciolino. W.W. Norton; 384 pages; $29.99 and £22.99 IF YOU WERE to walk through each of the Louvre’s ...

1 Which French monarch, an avid art collector, razed his old castle- fortress to build a new palace that he called The Louvre? 2 What is Francesco del Giocondo’s connection with The Louvre?

SCIOLINO: The Louvre is a tough place ... Maybe it was named after a fortified castle or a leper colony or an ancient signal tower or a plantation of oak trees. No one can tell you the answer.