Richard of St. Victor (c. 1160–1173) was a Scottish theologian and mystic associated with the Victorine Order. He is best known for his works on spirituality and the nature of God, emphasizing the importance of divine love and the inner life of the soul. His writings contributed significantly to medieval mysticism and the development of Christian thought. Richard's most notable work, The Twelve Patriarchs, explores the relationship between God and humanity, highlighting the transformative power of love. He also wrote The Book of the Trinity, which delves into the complexities of the Holy Trinity and the unity of God. His ideas influenced later theologians and mystics in the Christian tradition.