one of set of 13 prints (NGA 1946.21.389-401) purchased by Lessing J. Rosenwald, Philadelphia, from William H. Schab, 4 October 1946 (JYAE; 46.193); gift to NGA, 1946.
- "The Unfinished Print", The Frick Collection, New York; Städelsches Kunstinstitut Frankfurt am Main, 2004-2005.
- Focillon 30.
- Hind 7.
- Robison, Andrew. Piranesi Early Architectural Fantasies: A Catalogue Raisonne of the Etchings. Washington: National Gallery of Art; Chicago and London: The University of Chicago Press, 1986.