By chance, I went to the French National Library near l'Opéra. I only waited for 30 minutes to enter the library. (Before that I had most delicious Japanese noodles and dumplings I have ever tried.) I loved the exhibition called "de rouge et de noir" of Greek porcelain (3rd picture). The museum also displayed manuscripts from the time of Louis XIV. I certainly enjoyed the peaceful, graceful, and grand library atmosphere!