The number 102 in white appears on recto. The photograph is titled "Istaphan, Chehel Sotoun" in what may be the hand of Antoin Sevruguin.
Myron Bement Smith Collection: Antoin Sevruguin Photographs. Freer Gallery of Art and Arthur M. Sackler Gallery Archives. Smithsonian Institution, Washington D.C. Gift of Katherine Dennis Smith, 1973-1985. Museum number: FSA A.4 2.12.GN.35.04. Handwritten number (inked, probably by Antoin Sevruguin) reads, "899." Scratched handwritten number (inked, probably by Antoin Sevruguin) is not readable.
The image is reproduced on page 74 of Volume IV of “Du Khorassan au pays des Backhtiaris: trois mois de voyage en Perse” by Henry-Rene D’Allemagne published in 1911 by Hachette, Paris, France. The image is titled "Le peristyle de chehel-situn".