That's my translation of the entry for this property in the official record documenting the built heritage of Indre et Loire. My photos don't do justice to the place because of the intimidating wall which completely surrounds the complex and blocks your view of the house and outbuildings. The wall is the most obvious legacy of the building's days as a salt store, which was set up to be defended, almost at any cost.
Salt producers had to deliver their salt to the state salt stores, which were guarded by the military and administered by powerful civil servants, who set both the price they purchased at and the price they sold at. The salt was sold to traders, the tax collected and the traders added their margin and sold the salt on to the consumer. Every household had to have salt in quite large quantities before the days of refrigeration as salt curing was the principle means of preserving food, especially high value food like meat.
The gabelle was introduced by Philip the Fair in 1286 and not fully abolished until 1945.
UPDATE: 'Henri Proust' has written a good overview of the gabelle, with a discussion of the situation in Richelieu in particular, on his blog l'Eminence Rouge.