Studies on the subject mention that manuscripts relating to Leonardo’s idea for the robot are in the Codex Atlanticus, specifically folio 579r.
Codex Sinaiticus | codex | Codex Vaticanus | Lorsch codex | Codex Bezae | Codex | Roda Codex | Leningrad Codex | Hypatian Codex | Codex Washingtonianus | Codex Vercellensis | Codex Tchacos | Codex Sangallensis 878 | Codex Calixtinus | Codex Borgia | Codex Beratinus | Codex Aureus of Lorsch | Codex Atlanticus | Codex Argenteus | Codex Amiatinus | The sea slug ''Glaucus atlanticus | Paris Codex | Nowell Codex | Montpellier Codex | List of food additives,'' Codex Alimentarius | List of food additives, Codex Alimentarius | Glaucus atlanticus | Emmelichthyops atlanticus | Dresden Codex | Codex (Warhammer 40,000) |
According to an inventory dating back to 1615, it had paintings by Titian, Parmigianino, and Michelangelo; the inventory also mentions a book of drawings by Leonardo da Vinci, which scholars identify with the Codex Atlanticus now preserved in the Biblioteca Ambrosiana.