Hard to believe they display the real jewels.
You’d think they’d just use costume jewelry. How many would know the difference?
Agreed. They should just put up a photocopy of the Mona Lisa, too...
...and Gericault's Raft of Medusa ...
...and Delacroix's Liberty Leading the People ...
...and David's Oath of The Horatii.
Heck, just leave 'em all locked in the basement and fill the museum with 4k LED monitors showing JPEGs of them.
It certainly would solve the problem of having to fight past all the Japanese tourists to get a look at the Mona Lisa, just intermittently show her JPEG on every monitor in the place.