Charles Alexander Loeser was an active collector, primarily of drawings, and was based in Florence. At his death he left 262 old master drawings to the Fogg Art Museum at Harvard University, and eight paintings by Paul Cezanne to the White House; the rest of the collection was left to the city of Florence and housed at the Torri Gattaia. Old master paintings removed from the Torri Gattaia were sold at Sotheby's, London, on 9 December 1959. Subsequently other objects from the former Loeser collection were dispersed at auctions.
Obituary, Art News (24 March 1928)
Oberhuber, K. "Charles Loeser as a Collector of Drawings," Apollo CVII (June 1978):464