The National Archives opened to the public this week more than 40,000 case files on immigrants to the United States — and dedicated a research room at its San Bruno facility to the late Rep. Tom Lantos.

Lantos, who was Jewish, was a leading force in having the files re-designated as records of permanent historical value. The Tom Lantos Research Center was dedicated at a May 22 ceremony attended by Lantos’ successor, Rep. Jackie Speier (D–San Mateo), someone from the S.F. Bay Area Jewish Genealogical Society and others.

The immigration files, known as “Alien Files,” provide a wealth of genealogical information, such as photographs, correspondence, vital records, interview transcripts and visa applications. Millions more “A-Files” eventually will be opened to the public.

The National Archives at San Francisco is one of 22 facilities nationwide. It is located at 1000 Commodore Drive in San Bruno.