This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
U.S. Courthouse and Post Office Pittsburgh Detail of Ironwork for Stairs NARA .tif Scope and content From the federal government designed and built nearly buildings nationwide The Office of the Supervising Architect provided detailed drawings communicating every conceivable aspect of building's design and construction to the