The Pittsburg Historical Musuem is located in former Pittsburg Post Dispatch building within the industrial town of Pittsburg, California, which was formerly called Black Diamond.
The Post Dispatch had been the primary newspaper for the town of Pittsburg.
The museum has an extensive exhibit on the Italian Americans who lived in the town. During World War II, hundreds of Italians were sent to internment camps in Concord, Dublin and other areas. It was not until the William Jefferson Clinton administration that the U.S. Congress officially recognized that Italians had been interned during World War II.