Try a free trial of The Great Courses Plus and watch the course here: www.TheGreatCoursesPlus.com/lp/t2/generic?utm_source=Video&utm_medium=Youtube&utm_campaign=145766 In this clip from Understanding the World's Greatest Structures: Science and Innovation from Antiquity to Modernity, Professor Stephen Ressler shows you which pyramid from ancient Egypt changed structural engineering forever, See the entire course available on The Great Courses: Understanding the World's Greatest Structures: Science and Innovation from Antiquity to Modernity Don’t forget to subscribe to our channel – we are adding new videos all the time! www.youtube.com/subscription_center?add_user=TheGreatCourses