File:Chapelle.et.autel.png

...Il faut mentionner un fait important: soit que ces chapelles se composent de deux travées, comme à Senlis, ou de quatre travées, comme à Noyon et à Saint-Leu, l'autel de chacune d'elles est placé suivant l'axe du chevet, de façon à être toujours orienté, et, par conséquent, dans l'une des travées latérales, ainsi que l'indique la fig. 31...

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

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