Pope Pius II (Latin: Pius PP. II, Italian: Pio II), born Enea Silvio Bartolomeo Piccolomini (Latin Aeneas Silvius Bartholomeus; 18 October 1405 – 14 August 1464) was Pope from 19 August 1458 to his death in 1464. He was born at Corsignano in the Sienese territory of a noble but decayed family. His longest and most enduring work is the story of his life, the Commentaries, which is the only autobiography ever written by a reigning Pope.