1200 – 1280
Albertus Magnus (c. 1200–1280) was a German Dominican friar, bishop, and philosopher widely regarded as one of the greatest medieval scholastics. He was the first to apply Aristotelian philosophy systematically to Christian thought, pioneering the synthesis that his student Thomas Aquinas would later perfect. Canonized in 1931 and declared a Doctor of the Church, he is the patron saint of natural scientists.
First systematic Christian commentator on the full Aristotelian corpus, including natural philosophy, logic, and metaphysics
Teacher and mentor of Thomas Aquinas, shaping the Thomistic synthesis
Developed a metaphysics of essence and predication that distinguished quiddity from particular existence
Contributed to early empirical natural science through extensive observation and classification in biology and mineralogy
Declared Doctor of the Church (Doctor Universalis) in 1931