See also Chinon on Wikipedia, Chinon on Wiktionary, and the Encyclopædia Britannica, 1st edition, disclaimer. It is actually located at 47° 10′ N., 0° 14′ E.
CHINON, a town of France in the province of the Orleanois, about twenty three miles south-west of Tours; E. long. 20′, and N. lat. 47° 15′.