Kieff Antonio Grediaga (b. 1936) is a sculptor, graphic artist, draftsman, muralist, printmaker, jewelry-maker, and educator from Madrid, Spain. Grediaga (who signs his work ''Kieff'') began working as an apprentice in his fathers cabinetmaking atelier at an early age, and later went on to study technical drawing, industrial design, and architecture. Since 1969, Grediaga has lived in Montreal and Saint Bruno, Quebec, Canada. Although Grediaga's oeuvre and is impressive and wide ranging, he's probably best known for his abstract, lyrical table-top bronzes and his monumental sculptures that stand in parks, gardens, and headquarters of international companies worldwide. His works have been exhibited in the Mann Auditorium, Tel Aviv, Israel (1977); the National Gallery, Taipei, Taiwan (1988); the Centre d'Art Ozias Leduc, St. Hilaire, Quebec (1994); the Cultural Centre of Spain, Havana (1998 and 2002); the National Museum of Fine Arts, Havana, Cuba (2006); the Museum of the City, Madrid (2009), and many others.He is represented in the collections of the Philadelphia Museum, Taipei National Museum, and Tate Galleries in London, and the private collections of Mr. and Mrs. Ronald Reagan, the Rockefeller Collection, IBM, and Joan Collins.