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:
Leonardo da Vinci Diagram of proposed flying machine. en Title Disegni di Leonardo da Vinci Creator Leonardo da Vinci Contributor Prints by Carlo Giuseppe Gerli Date Published Trieste La Roccia Reprint of the edition Identifier FT Tavola XLII Format Book Rights Public domain Toronto Public Library cczero Uploaded with Flying