This is the Zollverein School of Management and Design by SANAA in Essen, Germany.
It's a concrete cube of 35m on each side, perforated with squares (in three different measures).
The ground floor contains public spaces; the cafeteria and exhibition spaces.
The second floor contains the library.
The first floor contains the design studio; the third, workspaces; and the roof, the future garden.
Images credits and more info here.