Yes, it’s an architectural design because Ludwig Mies van der Rohe is a German Architect. He is one of the pioneering Masters in Architecture along with Le Corbusier and Walter Gropius.
Ludwig Mies van der Rohe structural designs are of minimal styles. In fact, he called his buildings ‘skin and bone‘ architecture. He made use of materials such as industrial steels and plate glasses for the interior spaces. But I am not sure if he has utilized revell plastic materials.