One of my fav museums in Paris - Musee D'Orsay. And not for the art mind you (although they did have a number of greats...), but more for the beautiful conservation that was done on the former train station. Absolutely lovely. With a combination of the 2 - good works and a fantastic space - its no wonder its one of the most popular museums among both the French and visitors alike.

*ahem* that suspicious blue packet sitting next to me are my supervisor's Haribo gummy bears, I swear......