Yiarchitects Studio realized the project for this library situated in Stuttgart. The building project was formerly known as Library 21 . The basic form of the library is a cuboid with a square base of 44 meters side length and 40 meters . The outer shell of the double façade is dominated by glass blocks, while the interior consists of a glass facade. The building has nine above ground and two underground floors, on which a total of 500,000 media units are available.