David Howard Maude-Roxby-Montalto di Fragnito (born 30 August 1934), also known as David Montalto, 14th Duke of Fragnito is a Swiss-based British artist craftsman, specializing in diamond-point stipple engraving, glass sculpture, painting and jewelry. Montalto has exhibited extensively in Britain, Europe and the United States, including regular exhibitions in London, Geneva and Paris. Some of his works are on permanent show at the Victoria and Albert Museum in London, Philadelphia History Museum at the Atwater Kent in Philadelphia, the Corning Museum of Glass in New York, as well as royal and international private collections in Great Britain, Brunei, Oman and more.