This classic U.S. Post Office building in Green River, Wyoming was built in 1931 in the classic Greek Revival style then popular for Federal buildings. The structure now houses the Sweetwater County Historical Museum. Directly across the street from the Sweetwater County Courthouse, I thought at the time I photographed it (poorly) that it might have housed a Federal courthouse, as some posts offices did, but that does not appear to be the case for this one.
