Last year for Halloween, I did a post on ossuary art-macabre at its best! During the plague, there were so many dead, they could not all be buried and the bones became an issue.
Near Prague, the Sedlec ossuary is a macabre display of human bones in decorative use.
Bones from the bubonic plague and later wars now decorate the walls of the ossuary.
...and niches of the Sedlec chapel.
I think it was a dignified way to handle the situation. There is beauty and symmetry in the human form and the skeletal system.