The Château-Gaillard is a French hôtel particulier and an archaeological museum, built in the late Middle Ages in Vannes.
Wikipedia https://en.wikipedia.org/wiki/Château-Gaillard_(Vannes)
Official Website https://www.mairie-vannes.fr/vannesloisirs/musees/musee-dhistoire-et-darcheologie/
Phone +33 2 97 01 63 00
Coordinates 47°39'24.74" N -2°45'28.805" E