The art collection assembled by Edgar Degas was remarkable not only for its quality, size, and depth but also for its revelation of Degas's artistic affinities. He acquired great numbers of works by the nineteenth-century French masters Ingres, Delacroix, and Daumier; he bought (or bartered his own pictures for) art by many of his contemporaries, particularly Manet, Cezanne, Gauguin, and Cassatt; and he acquired works by a wide range of other artists, from eminent to little known. The extent of Degas's holdings was not recognized until after his death, when the collection came up for auction in Paris in 1918 and, in what was called the sale of the century, was widely dispersed. Extensive research has made it possible to "reassemble" that collection in book form. This summary catalogue contains information on the more than five thousand works owned by Degas. For each work catalogued the entry includes, to the extent possible: a description with medium and dimensions; provenance information about Degas's acquisition and ownership of the work; information pertaining to the sale of the work in 1918 (or its disposal earlier), including the purchaser, purchase price, and other data; the current location; selected references; and an illustration. In a concordance, collection sale lot numbers are listed with their corresponding summary catalogue numbers. This catalogue and its companion volume of essays are published in conjunction with the exhibition "The Private Collection of Edgar Degas," held at The Metropolitan Museum of Art, New York, from October 1, 1997, to January 11, 1998.