Teresa of Ávila was a Spanish mystic and reformer born on March 28, 1515. She is best known for her role in the Carmelite Order, where she founded the Discalced Carmelites, a reformed branch emphasizing a more contemplative and austere lifestyle. Teresa's writings on prayer and spirituality, including her famous work, The Interior Castle, have had a lasting impact on Christian mysticism. In 1970, Teresa was declared a Doctor of the Church, recognizing her significant contributions to theology and spirituality. She is also the patron saint of Spain and loss of parents, celebrated for her deep devotion and commitment to her faith throughout her life.