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.
Fibonacci numbers in Zurich HB. ru de FibonacciFolge in Zrich Hauptbahnhof en Fibonacci sequence at the Zurich Main Station own Gorodilova Fibonacci numbers Cczero
Page 2023 Free-images.com. All images are Public Domain