Last spring, the world’s most-visited art museum, the Louvre in Paris, proposed moving its most popular artwork—Leonardo da Vinci’s Mona Lisa—to its own subterranean room. Now, that idea is becoming reality.

A Louvre expansion that would put La Gioconda in her very own gallery has us envisioning the most mysterious sitter in iconic rooms of art history.

President Emmanuel Macron announced plans to alleviate crowds at the Paris museum and to charge higher fees for visitors from outside the European Union.