Old Main is a historic building on the campus of Pennsylvania Western University California (known before July 2022 as California University of Pennsylvania) in

California, Pennsylvania California is a borough on the Monongahela River in Washington County, Pennsylvania, United States, and part of the Pittsburgh metropolitan area since 1950. The population was 5,479 as of the 2020 census and was estimated at 5,453 in 2021. Cali ...

. It is designated as a historic public landmark by the

Washington County History & Landmarks Foundation Washington County History & Landmarks Foundation is a Non-profit organization, non-profit educational institution in Washington, Pennsylvania. Its purpose is to encourage and assist the preservation of historic structures in Washington County, Pen ...

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National Register nomination form National may refer to: Common uses * Nation or country ** Nationality – a ''national'' is a person who is subject to a nation, regardless of whether the person has full rights as a citizen Places in the United States * National, Maryland, ce ...

University and college buildings on the National Register of Historic Places in Pennsylvania School buildings completed in 1868 Buildings and structures in Washington County, Pennsylvania California University of Pennsylvania University and college administration buildings in the United States National Register of Historic Places in Washington County, Pennsylvania {{WashingtonCountyPA-NRHP-stub