PDC-F-000430-0000 Three people are climbing a snow-covered mountain using a rung ladder. Their dark clothes stand out clearly against the white snow Credit: Alinari Archives, Florence WARNING: Permission must be required for non editorial use. Please contact Alinari Archives Photographer: Charnaux, F. Date of photography: 1860-1880 ca. Place of photography: Switzerland Collection: Alinari Archives-Palazzoli collection, Florence Object type: stereograph Photographic technique: P albumen Dimensioni: 79 x 142 mm Technical info Image sizes (pixel): 2910 X 1717 Image sizes (cm at 300 dpi): 24 X 14 Image sizes (MB): 4.48 Color space: RGB