Since 2017, when the Urban Nation museum has been inaugurated, Le Grand Jeu collaborates with the Stiftung Berliner Leben foundation and supports the development of the Martha Cooper Library, the first documentation center in the world totally devoted to the preservation of documents and archives related to graffiti and street art cultures.

The library has been created starting with a group of books, magazines and other objects, like stickers, t-shirts donated by the New York renowned photographer Martha Cooper.