Gurlitt died in his Munich apartment, according to his spokesman, who did not provide further details on the cause of his death. Gurlitt underwent surgery for heart problems last year.
Gurlitt's collection of some 1,280 artworks were seized by German police last year during a tax evasion investigation. The collection includes priceless paintings and sketches by Picasso, Matisse and Chagall. Much of it was classified as "degenerate" art by the Nazis.