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.
DreckerBauernring. PDold Skizze eines Bauernringes Hhensonnenuhr Joseph Drecker Theorie der Sonnenuhren Vereinigung Wissenschaftlicher Verleger Abb Joseph Drecker nachbearbeitet von Dr Ing Wetzel alias Analemma Ring dials
Page 2023 Free-images.com. All images are Public Domain