If the King Louis XII were to die without producing a male heir, Charles of Luxembourg would receive as dowry the Duchy of Milan, Genoa and its dependencies, the Duchy of Brittany, the counties of Asti and Blois, the duchy of Burgundy, the Viceroyalty of Auxonne, Auxerrois, Mâconnais and Bar-sur-Seine.
This truly would have cut up France, so the marriage was cancelled.
Though of ancient origin, Blois is first distinctly mentioned by Gregory of Tours in the 6th century, and was not of any importance till the 9th century, when it became the seat of a powerful countship.
Blois was occupied during World War II by the German army, which took the city on June 18, 1940.