Signed, in negative, lower right: G. Sommer - Napoli
Stamped, on mount verso, lower left: DETROIT INSTITUTE OF ARTS | REFERENCE LIBRARY Marks, in pencil, below stamp: g. of E.B.W.
Inscribed, in negative, lower left: 1203 Pompei. Tempio di Venere Inscribed, in ink, on mount, lower center: Temple of Venus - Pompei