Signed photograph of the revered Russian-born American classical pianist and composer, shown in his later age posing against a tree.  Widely regarded as one of the greatest pianists of all time, Horowitz was acclaimed for his virtuoso technique, his tone color, and the excitement that was engendered by his playing.  Signed and inscribed in black ink, dated 1976.  Minor tear to the left margin edge, else fine.  8 x 10 inches (20.3 x 25.4 cm.).