French Granary/ Grainary Barn Research

Hi, I need some info on a Granary/ Grainery in France. It was located in the Loire Valley, about 150km south east of Orleans, not far from Sancere. This shed did not have a name, it was a fairly non-descript building, however there was a headboard that had "HK ANNO 1760" carved into it (see picture). I'm looking for any information about this specific building, an address, photos, google maps location etc. Thank you. Cam.