File:Plan.salle.voutee.png

...Supposons donc une salle (27) devant être voûtée, ayant, dans œuvre, 12^m,00 de large et composée de travées de 6^m,00 d'axe en axe. Adoptant le système de voûtes en arcs d'ogive traversés par un arc doubleau, suivant la méthode des constructeurs de la fin du XII^e siècle...

This image comes from Dictionary of French Architecture from 11th to 16th Century (1856) by Eugène Viollet-le-Duc (1814-1879).

	This work is in the public domain in its country of origin and other countries and areas where the copyright term is the author's life plus 100 years or fewer. This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1929.
This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights.

https://creativecommons.org/publicdomain/mark/1.0/PDMCreative Commons Public Domain Mark 1.0falsefalse

This math image could be re-created using vector graphics as an SVG file. This has several advantages; see Commons:Media for cleanup for more information. If an SVG form of this image is available, please upload it and afterwards replace this template with {{vector version available|new image name}}. It is recommended to name the SVG file “Plan.salle.voutee.svg”—then the template Vector version available (or Vva) does not need the new image name parameter.