Lewis D. Klein was an architect in the Dayton, Ohio area from 1957 to 1983. The collection consists of drawings for 230 different architecture design jobs he bid on. The collection includes from proposed or conceptual drawings up to full sets of plans. Of the 230 jobs, 27 are for residences and 49 are for apartment complexes. The rest are commercial buildings, including shopping plazas, churches, and various business facilities.

Dale D. Smith was a Dayton, Ohio architect who began working at Richard Levin Associates in 1966 and later founded Dale D. Smith Architects in 1982. The Dale D Smith Architectural Collection comprises architectural drawings, plans and sketches, photographs, notes, correspondence and other paperwork pertaining mainly to projects worked on by Dale D. Smith at Dale D. Smith Associates. Some architectural drawings were created by Smith whilst working as a consultant for other companies.