Considering the Hotel Jehan de Beauce in Chartres?
A VT member wrote the following comment about visiting Chartres:
Enclos de Loens by Tom_Fields
This 13th century house was once property of the diocese of Chartres, where the clergy stored their grain and wine (used in communion services). Today, it's a museum of stained glass windows, called the Centre international du Vitrail. A prime example of late medieval architecture.