Cyanotype, detail from the Chartres Cathedral, circa 1850-1853. From a calotype waxed negative. Matted to 14 x18 Boehringer Gallery label on verso, Lot 2861 , Butterfield auction ca. 1994 a pioneering photographer, born in Grasse, France. He studied under the painters Paul Delaroche, Ingres and Drolling before establishing his own studio at 21 Quai Bourbon on the â•¬le Saint-Louis, Paris Signature: Unsigned. Medium: Print. Framing: Unframed. Artist: Charles Negre. Size: 7.25 x 5.25 (sight).