Bl. John Duns Scotus (1266-1308)
Born a wealthy farmer, John was a Franciscan priest who lectured at Oxford and Cambridge for four years, and then traveled to Paris to teach and complete his doctorate. He is the founder of a school of scholastic thought called Scotism. His defense of the Immaculate Conception of Mary was so convincing that Pope Pius IX solemnly defined the dogma in 1854 largely due to his work. Learn more HERE.