St. Ignatius of Loyola was a Spanish priest and theologian, born in 1491. He is best known for founding the Society of Jesus, also known as the Jesuits, in 1534. His spiritual writings, particularly the "Spiritual Exercises," emphasize discernment and finding God in all things. Ignatius played a significant role in the Catholic Reformation, promoting education and missionary work. He was canonized as a saint by Pope Gregory XV in 1622. Today, his legacy continues through the many Jesuit institutions around the world, which focus on education, social justice, and spiritual growth.