Elizabeth of the Trinity, OCD, born Élisabeth Catez, was a French Discalced Carmelite, a mystic, and a spiritual writer. She was known for the depth of her spiritual growth as a Carmelite as well as bleak periods in which her religious calling was perceived to be unsure according to those around her; she however was acknowledged for her persistence in pursuing the will of God and in devoting herself to the charism of the Carmelites.

The Discalced Carmelites, known officially as the Order of the Discalced Brothers of the Blessed Virgin Mary of Mount Carmel or the Order of Discalced Carmelites, is a Catholic mendicant order with roots in the eremitic tradition of the Desert Fathers. The order was established in the 16th century, pursuant to the reform of the Carmelite Order by two Spanish saints, Teresa of Ávila (foundress) and John of the Cross (co-founder). Discalced is derived from Latin, meaning "without shoes".