Teresa of Ávila, by Rubens. This is the portrait of Teresa that is probably the most true to her appearance. It is a copy of an original 1576 painting of her when she was 61. Teresa of Ávila (born Teresa Sánchez de Cepeda Dávila y Ahumada; 28 March 1515 – 4 or 15 October 1582), also called Saint Teresa of Jesus, was a Carmelite nun and prominent Spanish mystic and religious reformer. Her autobiography, The Life of Teresa of Jesus, and her books The Interior Castle and The Way of Perfection are prominent works on Christian mysticism and Christian meditation practice. In her autobiography, written as a defense of her ecstatic mystical experiences, she discerns four stages in the ascent of the soul to God: mental prayer and meditation; the prayer of quiet; absorption-in-God; ecstatic consciousness. The Interior Castle, written as a spiritual guide for her Carmelite sisters, uses the illustration of seven mansions within the castle of the soul to describe the different states one's soul can be in during life.