John of the Cross (San Juan de la Cruz) (24 June 1542 - 14 December 1591), born Juan de Yepes Alvarez, was a major figure of the Counter-Reformation, a Spanish mystic, Catholic saint, Carmelite friar and priest, born at Fontiveros, Old Castile. Saint John of the Cross was a reformer of the Carmelite Order and is considered, along with Saint Teresa of Avila, as a founder of the Discalced Carmelites. He is also known for his writings. Both his poetry and his studies on the growth of the soul are considered the summit of mystical Spanish literature and one of the peaks of all Spanish literature.