I was recently vacationing in France and, while there, thought it would be fun to take a picture of a library to bring back for the blog. I managed to find the Bibliothèque National de France (BnF, the National Library of France) on the Rue de Richelieu. By law, every book published in France is added to the Bibliothèque National de France. A newer library building, the François-Mitterrand, now holds the majority of the books, periodicals, and CDs. This BnF on the Rue de Richelieu does still hold some collections.
Like the Library of Congress and the Law Library of Congress, the BnF also has Ask A Librarian and a Facebook page.