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.
Gli archi rampanti nella cattedrale di Saint Michel Francia . en Balance of orizontal efforts it Bilanciamento delle spinte orizzontali produzione propria Piergiorgio Rossi ago Abbatiale de Mont SaintMichel
Page 2023 Free-images.com. All images are Public Domain