San Francisco History Center helps turn an old address into a research question

Image: AI-generated illustrative photograph of generic archival research supplies; not San Francisco History Center records, a collection item or a research workstation.

A building's address is a useful beginning, but it rarely explains the whole story. San Francisco Public Library's History Center brings photographs, maps, directories, newspapers and archival collections together, allowing a question about a place to move between different kinds of evidence.

The Daniel E. Koshland San Francisco History Center is on Main Library's sixth floor at 100 Larkin Street. It is also the archives for the City and County of San Francisco. Its website links building-research guidance, city and telephone directories, digital collections and the historical photograph collection.

Start online with an address, name or approximate period, then note the source and identifier for anything useful. The center explains that not all holdings are represented fully in the catalog. Ask a librarian about indexes, folder lists or descriptive guides before deciding that an unsuccessful search means the evidence is absent.

For an in-person research visit, check current department hours and collection-use guidance and contact sfhistory@sfpl.org about material you hope to consult. Classes and groups need advance arrangements, with a separate request form for grades 7–12. Keep observations and inferences distinct: a directory entry may establish a name at an address, while a photograph may raise the next question about what changed.

Sources and visit details

• San Francisco Public Library: History Center location, research tools, digital collections and group visits
• San Francisco Public Library: non-circulating collections and material not fully represented in the catalog