Cyanotype, Chartes Cathedral, small side altar detail, from a calotype negative. Matted 18 x 14 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: 6.25 x 4.75.