John Colet was an English churchman, theologian, and educational reformer who lived during the 15th and 16th centuries. He is best known for his role in founding St. Paul's School in London, which was one of the earliest and most influential grammar schools in England. Colet was also a prominent figure in the English Renaissance and a leading advocate for the study of classical languages and literature. His ideas and contributions had a significant impact on the development of education and religious thought in England during his lifetime.