This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Architonnerre. of which is found in the papers of Leonardo da Vinci although he attributes its invention to Archimedes superstock Creator Leonardo da Vinci century PDold Technical drawings by Leonardo da Vinci War machines by Leonardo da Vinci Cannons in manuscript Early steam engines Inventions Mirror writings by Leonardo da