Óscar Arístides Renta Fiallo (22 July 1932 – 20 October 2014), known professionally as Oscar de la Renta , was a Dominican fashion designer. Born in Santo Domingo , he was trained by Cristóbal Balenciaga and Antonio del Castillo . De la Renta became internationally known in the 1960s as one of the couturiers who dressed Jacqueline Kennedy . He worked for Lanvin and Balmain . His eponymous fashion house has boutiques around the world including in Harrods of London and Madison Avenue in New York.