Final answer:
Walter Gropius served the functional role of designing the Bauhaus school, which advanced the art of modern architecture and emphasized simplicity and mass production.
Step-by-step explanation:
Walter Gropius served the functional role of designing the Bauhaus school, which advanced the art of modern architecture. The Bauhaus was an interdisciplinary institution that brought together performing arts and visual arts, creating a methodology that emphasized simplicity and mass production. Gropius aimed to unify arts based on crafts, with workshops in cabinetmaking, textiles, metalworking, typography, and architecture. The concepts of the Bauhaus aimed to bring crafts on par with sculpture and painting in the world of fine arts.