File:Coupe.porte.XIe.siecle.png

...En Auvergne, dans le Nivernais, une partie du Berry, de la haute Champagne et du Lyonnais, il existe quelques baies de ce genre à un seul vantail, qui remontent aux dernières années du XI^e siècle. La figure 72 bis donne la coupe de ces portes, dont l'arc de décharge forme berceau à l'intérieur, au-dessus du tympan...

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.
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