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.
Voute.arete.sur.plan.carre. Drawings by Eugne ViolletleDuc Ainsi fig soit une vote d'arte sur plan carr le rabattement du formeret tant abcdaeeffgcllme'l'f'm'oee sicle Eugne Viollet le Duc ViolletleDuc Vault ViolletleDuc
Page 2023 Free-images.com. All images are Public Domain