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:
Vis aerienne Luc Viatour. en Air screw is drawing Ms by Leonardo da Vinci fr Vis arienne Plume et encre sur papier vers Extrait du Ms par Lonard de Vinci Photography own work lucnix be www lucnix be Nikon case optical Sigma mm Macro Photography Luc Viatour Photography User Lviatour GFDL Ccbysa migrated ccbysa Luc Viatour