Johann von Staupitz was a German theologian and a significant figure in the early Reformation. Born around 1460, he became a member of the Augustinian order and served as the vicar general of the order in Germany. Staupitz is best known for his mentorship of Martin Luther, encouraging him to pursue his theological studies and emphasizing the importance of faith and grace. Staupitz played a crucial role in shaping Luther's ideas, particularly regarding the concept of justification by faith. He was instrumental in guiding Luther during his spiritual struggles and helped him find peace through a deeper understanding of God's mercy. Staupitz's influence contributed to the development of the Protestant Reformation.