In a suburb of Kutna Hora in the Czech Republic called Sedlec, is a chapel which was converted in to a bone storage building with the overflow of bones due to an outbreak of the Plague in the 14th century. In 1870 a Frantisek Rint decided to arrange the bones into more interesting patterns…. you can see the results for yourself above. There’s plenty more to read about it here if you want to know more.