Cause of death: cancer
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, and is headquartered on Madison Avenue in Manhattan.
Source : Wikipedia