Among the Impressionists Sisley has been overshadowed by Monet. Sisley's work very similar to that of Camille Pissarro. Described by art historian Robert Rosenblum as having "almost a generic character, an impersonal textbook idea of a perfect Impressionist painting", his work strongly creates atmosphere and his skies are always very impressive. His concentration on landscape subjects was the most consistent of any of the Impressionists.