The California Historical Society collects materials of enduring historical and cultural value in support of its mission to inspire and empower Californians to make the past a meaningful part of their contemporary lives. In our North Baker Research Library, we hold some fifty thousand books and pamphlets, four thousand manuscript collections, half a million photographs, as well as ephemera,…

The California Institute of Technology Archives and Special Collections, founded in 1968, has a mission of facilitating understanding of Caltech’s role in the history of science and technology. Our collections include the papers of Caltech researchers; photographs, film, audio, video, websites, and publications documenting Caltech’s history; scientific instruments characteristic of research at…