Simón Narciso Díaz Márquez (August 8, 1928 – February 19, 2014) was a Venezuelan singer and Grammy Award-winning composer of Venezuelan music.Díaz endeavored to recover the folklore and musical traditions of the llanos, the Venezuelan plains. This style of music has since been performed by artists such as Argentina's Mercedes Sosa, Brazil's Caetano Veloso, Spain's Joan Manuel Serrat, Peru's Susana Baca, Puerto Rico's Danny Rivera, and Venezuelans Franco De Vita, Soledad Bravo, Juan Carlos Salazar, Carlos Baute and José Luis Rodríguez, among others. Many of Diaz's works have been adapted by symphonies and choral ensembles throughout Venezuela, as well as being incorporated into the orchestral and choral arrangements of conductors and composers of academic music.