Ignatz Heinrich Mühlwenzel (c. 1690 – 11 July 1766) was a Bohemian mathematician. Ignatz Heinrich Mühlwenzel (referred to in Biographisches Lexikon des Kaiserthums Oesterreich as Heinrich Mühlwenzel) was a member of the Jesuit order and a professor of mathematics at the University of Prague. He was of minority German ethnicity in western Czech border. He was a skilled optician who ground lenses for his own telescopes. Mühlwenzel is notable because his mathematical "descendants," which include Johann Radon, number more than 10,000. In 1736 he published Fundamenta mathematica ex arithmetica, geometria et trigonometria.