Not a Chateau

In the land of châteaux, this isn't a château. In fact it is hardly even a building any more, just an end wall. I imagine it is pretty old, but we've never managed to find out how old.

It is within 1.6km (1 mile) of la Poste in Preuilly-sur-Claise, and right on the border of the commune. Do you know where it is?