- This collection contains the correspondence, photographs, project files, and drawings of architect Carleton Winslow, Sr., who is known for his work on the Panama-California Exposition of 1915 in San Diego, the Los Angeles Public Library headquarters building, as well as churches and residences in Southern California and Santa Barbara.
- The Laumann Yosemite Collection consists of photographic prints and glass plate negatives of two of the Laumann family's visits to Yosemite National Park and the Sierra, the first in circa 1908 and the second in 1923. Photographs taken by Frank E. Laumann include familiar landmarks such as El Capitan, Mirror Lake, Vernal Falls, Half Dome and Hetch Hetchy as well as Laumann family and friends.
- The Hearst Ranch and Cayucos Photograph Collection contains nine vintage snapshots and 1 mounted print believed to have been taken by longtime Central Coast resident Clayton Leonard Morss (1891-1967). Includes black-and-white snapshots of construction of the Hearst Ranch in San Simeon, California, in the 1920s, and albumen prints of the town of Cayucos, California in the 1890s, both in San Luis Obispo County.
- The Horner Architectural Photography Collection contains 307 vintage, black and white mounted photographs taken by Benjamin Bean Horner (1893-1971), an architect who practiced in Southern California, primarily Los Angeles and Santa Barbara. The photographs are from the 1920s; the majority of the images are of historic structures in England and California.