1:40 The heavy plough. 3:02 Eyeglasses. 4:28 Rotating three-field system. 6:02 Windmill post. 7:31 Magnetic compass. 9:00 Trebuchet. 11:10 Flying buttress. 13:13 Astrolabe. 15:15 Clockwork. 18:09 Gothic rose window. 10 Medieval Inventions So Advanced We Still Can't Beat Them | 22:54 Medieval Wisdom | 56.9K subscribers | 143,125 views | August 21, 2025