No castle this Sunday but its urban equivalent: the mansion house (hôtel particulier). L'hotel du Bas du Gast was built in the XVIIIe century by a salt-taxman. At this time, salt was crucial for food preservation. Its trade was controlled by the Kingdom and it used to be a tax.
The hashtag #landofa100castles is dedicated to the castles you can see in the French county "la Mayenne" hosting more than 250 castles!