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:
Kodeks madrycki Leonardo. Sketch of the first known depiction of valve flush toilet Via Anthony Ravielli from Codex Madrid as lost page discovered in Via Martin Gardner in Scientific American April th century Creator Leonardo Da Vinci Image Leonardo da Vinci koa zbate acuchy od roweru Kodeks Madrycki Gears and Chains Image Leonardo