Exterior, A-Frame RoofLine, Mid-Century Building Type, and Prefab Building Type The seeds for Frank Lloyd Wright's collaboration with prefab builder Marshall Erdman were planted when Erdman hired the architect to design the First Unitarian Society meeting house in Madison, Wisconsin. [Photo credit courtesy The Kubala Washatko Architects (TKWA) via ArchDaily]  Photo 6 of 6 in A Look at Frank Lloyd Wright's Little-Known Prefabs