Livio Catullo Stecchini (6 October 1913 – September 1979) was a professor of ancient history at Paterson State Teachers College (now William Paterson University) in New Jersey. He wrote on the history of science, ancient weights and measures (metrology), and the history of cartography in antiquity. He is best known as a defender of the theories of Immanuel Velikovsky and for his numerological theories about the dimensions of the Great Pyramids.