Walter Benedict Cahn (born 24 September 1933) is a German-born American medievalist and art historian who taught at Yale University as Carnegie Professor of the History of Art.
Walter Cahn was born in Karlsruhe on 24 September 1933 to Otto and Frieda Cahn.
His Jewish family was deported to France in 1938, and after surviving World War II there he reached the United States in 1948.
Walter Cahn was educated at the Pratt Institute, and after switching to art history, in New York, Paris and London, before reaching Yale, where he spent the rest of his career.
He was awarded a Guggenheim Fellowship in 1981, and has served as a councillor of the Medieval Academy of America.
Cahn was elected a fellow of the Medieval Academy of America in 1989.
An exhibition at Yale's Beinecke Library was held in 2003 to in Cahn's honor.
In 2014, Cahn was elected a fellow of the American Academy of Arts and Sciences.