Last weekend I managed to visit the Potern museum for the first time. Simon visited exactly a year ago and wrote about it here.
The Poterne was the gatehouse to the château in Preuilly-sur-Claise. It is now the town museum, run by the Société Archaéologique (local history society). At the moment it is funded by the Society, but that responsibility is apparently due to be transferred to the Commune soon.
The museum is staffed entirely by volunteers, many of them teenagers, who open up and give guided tours (in French - if you speak English there is a written guide).
*everyone and his dog world has taken a photo of the poterne from below - except Simon. Otherwise we could show you the "usual" view as well.