Papers of the architect Thomas "Thom" Hacker (1941-2023), primarily architectural sketches and drawings relating to his projects. Hacker taught at the University of Oregon in Eugene, Oregon, in the 1970s, and later headed an architectural firm in Portland, Oregon.

Blueprint plans and illustrations of buildings designed by the architectural firm Lawrence & Holford, which operated in Portland, Oregon, in the 1910s and 1920s. The firm was later named Lawrence, Holford, Allyn & Bean, and then Lawrence, Holford & Allyn.

Color illustrations of buildings and proposed buildings designed by the architectural firms Tourtellotte & Hummel and Tourtellotte & Phillips. Tourtellotte & Hummel was an early 20th century architectural firm headed by John E. Tourtellotte (1869-1939) and Charles F. Hummel (1857-1939). Tourtellotte later paired with Truman E. Phillips (1902-1989).