Buildings made of human bones: exploring the world's ossuaries and charnelhouses
Never heard of an ossuary or charnelhouse? They're the final resting place for human skeletons. In religious sites - primarily churches - masses of human bones have been kept safe for centuries. Initially, the idea was to keep a body in tact on sacred soil when the rapture came. Later, cavernous rooms made of bones were erected to remind us of our mortality.