Agustín Pío Barrios (also known as Agustín Barrios Mangoré) (born May 5, 1885 in San Juan Bautista de las Missiones, Paraguay; died August 7, 1944) was a Paraguayan guitarist and composer. \r Barrios was famed for his phenomenal performances, both live and on gramophone recordings ? the first classical guitar music ever committed to disk. For some years, it was his habit to perform in concert in traditional Paraguayan dress (he was partly of Guarani origin).