John Kempen

John Kempen, also known as John of Rupescissa, was a 14th-century Franciscan friar and alchemist, recognized for his writings on alchemy and mystical spirituality. He is best known for his prophetic visions and works that combined religious themes with alchemical processes. His ideas reflected the medieval worldview, merging science and spirituality, and he believed in the transformative power of alchemy not just for material wealth, but for personal salvation and enlightenment. His influence can be seen in later spiritual and alchemical traditions, bridging the gap between science and mysticism during a crucial period in the history of thought.