thumb|right|250px|Leonardo da Vinci's pen and ink drawing of the Architonnerre/Architronito
thumb|right|250px|Leonardo da Vinci's pen and ink drawing of the Architonnerre/Architronito
The Architonnerre (Architronito) was a steam-powered cannon, a description of which is found in the papers of Leonardo da Vinci dating to the late 15th century, although he attributes its invention to Archimedes in the 3rd century BC.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).