[COM9]

You're not totally wrong, buy there's a really nice Delacroix not far from the totally underwhelming Mona Lisa / Joconde. (Yes "later", but still a must see.)

And I'm not totally sure, but I would bet that a lot of early medieval Christian art is French? I mean the Carolingians / Merovingians must have left something no?

And if the Louvre doesn't have impressionist art I would be totally disappointed? You're probably talking about the tennis court museum (edit: Jeu de paume museum, not far from the Louvre), but still? I think the problem is that the Louvre is so big than you're gonna miss stuff.

[Ichthypresbyter]

The Mona Lisa, of course, was completed in France.

In terms of French art, the hall of 19th century French paintings is impressive, and interesting as you can clearly see which paintings are in the guidebook as "must see"- there is usually a huge crowd around Liberty Leading the People (the painting you mention), a somewhat smaller one around The Raft of the Medusa, and paintings like the huge and spectacular Coronation of Napoleon on the opposite wall or the powerful The Lictors Bring Brutus the Bodies of his Sons further along are essentially ignored.