Timothy H. O'Sullivan
License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
Timothy H. O'Sullivan. [Yellow House [also known as Yellow Tavern], Headquarters of the 6th Army Corps, Warren Station, in Front of Petersburg, Virginia], 1861–65. The Metropolitan Museum of Art.