What powerful leader helped Michelangelo write his study of art?

The powerful leader who helped Michelangelo write his study of art was Pope Julius II. He was a significant patron of the arts and commissioned several of Michelangelo's most famous works, including the Sistine Chapel ceiling. Julius II's support and influence provided Michelangelo with the resources and encouragement he needed to explore and articulate his artistic theories. Their collaboration greatly shaped the course of Renaissance art.