Believe it or not, this stuff was assembled as late as the 1870s - it is not a relic from the barbarian dark ages! Someone had far, far too much time on their hands I think, to come up with this idea. The bones were removed from the cemetary around 1500 to make room for new customers and placed in the ossuary; a perfectly sensible thing to do and a pretty regular practice. Actually _decorating_ the crypt with them is rather more irregular!

The neck-bone's connected to the... they are all there, at any rate. Every bone in the human body. Several times over.

Here your friendly neigbourhood Duke gives you nice cushy job redecorating the local ossuary, and what do you do to thank him? This, of course!