| Louis de Clercq Kalaat-El Hosn, deuxième enceinte, extérieur, midi 1859-1860 Albumen print, from waxed paper negative 21.5 x 28 cm (8 7/16 x 11 ins) National Gallery of Art Horace W. Goldsmith Foundation through Robert and Joyce Menschel2001.111.3 LL/54881
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