Belle-Isle-en-Terre is a commune in the Côtes-d'Armor department of Brittany in northwestern France. Belle isle - in modern French - Belle île meaning "beautiful island" and en Terre significate "on the ground".
Wikipedia https://en.wikipedia.org/wiki/Belle-Isle-en-Terre
Coordinates 48°32'38.307" N -3°23'44.054" E
