California Institute of Technology
Access and Use


Access and Use
· Access Policy
· Reproduction & Use Policy
· Information for Visitors
· Fee Schedule
· Grants-In-Aid
· Accessibility

· Archives Account Login



Max Delbruck with cigar and cup of coffee. Photo by Ross Madden from Black Star, February 1949. Photo ID 1.3.1-6




Access Policy


The Archives Reading Room is CLOSED until further notice.
For research assistance please contact


Members of the Caltech community have access to the Archives during our Reading Room hours, which are Monday through Friday, 8:30 am to 4:00 pm. All who wish to visit are requested to phone or write ahead to be sure of staff assistance and space availability.

Other qualified researchers
are welcome to submit requests for research appointments and for reproduction of archival materials. Students and some researchers may be requested to supply letters of reference from an advisor or employer.

All patrons are required to register online one time and then to submit requests through our online system. Account information must be updated annually. Users with an active Caltech affiliation may use access.caltech credentials for quick authentication.

Create an Archives account or log in to your existing account

With an Archives account, patrons can manage and review requests, download materials electronically, and schedule appointments. Patrons can also send requests for materials directly from our collection guides at the Online Archives of California (OAC). Archives staff will review requests and respond as promptly as possible.

General inquiries or questions about access may still be submitted by e-mail, telephone, or mail, using the information given below or in the Contact menu.

More information regarding access and visiting is on our Information for Visitors page.


Contact Information

Fax (626) 395-4073
Telephone (626) 395-2704
U.S. Mail Caltech Archives
Mail Code B215A-74
Pasadena, California 91125



The Archives Reading Room is CLOSED until further notice.
For research assistance please contact


Archives Reading Room Hours:
Monday through Friday
8:30 a.m. to 11:45 a.m. and 1 p.m. to 4 p.m.
(early closing on Thursday mornings at 11:00)

Please note: Access to the Caltech Archives for the non-campus community is by appointment only. Campus community is encouraged to call before visiting the Archives.

We are closed on weekends and major U.S. holidays.

Upcoming holidays:

  • Monday, July 5th 2021 (Independence Day)
  • Monday, September 6th 2020 (Labor Day)
  • Thursday, November 25th- Friday, November 26th 2021 (Thanksgiving Holidays)
  • Thursday, December 23rd 2021 - Friday, December 31st 2022 (Christmas-New Year Holidays)

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