Walter Gropius gave him permission to sit in on all workshop classes .
In 1919 Max Peiffer Watenphul enrolled as a student at the Bauhaus in Weimar .
Walter Gropius gave Max Peiffer Watenphul permission to sit in on all workshop classes .
In 1919 Max Peiffer Watenphul enrolled as a student at the Bauhaus in Weimar .