- Post Office - Columbia PAThe post office in Columbia was completed in 1935 with funds provided by the federal government. It is also the site of Bruce Mitchell's 1938 mural, "Columbia Bridge," painted for the Treasury Section of Fine Arts and viewable in the lobby.
- Post Office Mural - Columbia PABruce Mitchell painted the oil-on-canvas mural "Columbia Bridge" in 1938 for the Treasury Section of Fine Arts. It is viewable in the lobby of the Columbia post office.