Access and Use
· Access Policy
· Reproduction & Use Policy
· Information for Visitors
· Fee Schedule
· 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
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.
Mail Code B215A-74
Pasadena, California 91125
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.
- Monday, May 28th 2018 (Memorial Day)
- Wednesday, July 4th 2018 (Independence Day)
- Monday, September 3rd 2018 (Labor Day)
- Thursday, November 22th-Friday, November 23rd 2018 (Thanksgiving Holidays)
- Monday, December 24th 2018-Tuesday, January 1st 2019 (Christmas-New Year Holidays)