My least favorite was the Mona Lisa. It was a madhouse, literally, and I'm just glad we got out alive.
It's pretty cool to finally see the artifacts of everything you've ever read or hear about in history. The picture of the ancient pottery decorated with what we now call swastikas is for Shari, who has said that the (now corrupted) symbol has been around for a long time! Pretty amazing stuff...
Below, the painting with the longest title, David's "Sacre of the Emperor Napoleon I and the crowning of the Empress Joséphine in the cathedral of Notre-Dame of Paris" and Delacroix's "Liberty Leading the People," First picture (above): my own artistic rendering of "Nike" or "Winged Victory."