The Stuttgart City Library is one of the most beautiful libraries in the world. There is no direct lighting in the whole hall, and the white is also used as the main tone. The museum is designed by the German Korean designer YiEun-young, and its cube structure is inspired by the design. In the Pantheon of ancient Rome, the center of the library has designed a "heart" of a straight structure, which is convenient for multi-floor meetings, and allows natural light to penetrate the roof and be shot into the museum.