Friedrich Krupp Administration Building and Exhibition Hall, Hugel Park, Essen, Germany (Absaugstationen, Schleusen und Automaten im UG. [Air ducts, air lock, and control room at basement]. Plans, elevation, sections.)
Ludwig Mies van der Rohe
American, born Germany. 1886–1969
Pencil, Ink on acetate
Mies van der Rohe Archive, gift of the architect