Built in Baroque style in the last quarter of the 18th century, the temple serves as a mass grave with thousands of skulls and human skeletal remains adorning its interior walls, floor, ceiling, and foundations.

[3][4] Together with sacristan J. Schmidt and grave digger J. Langer, father Tomášek who was inspired by the Capuchin cemetery while on a pilgrimage to Rome,[5] collected the casualties' bones, cleaned and put them in the chapel within 18 years (from 1776 to 1794).

Inside are a crucifix and two carvings of angels with Latin inscriptions that read "arise from the dead" and "come to judgment".

[6] A recording inside the church available in three languages (Polish, Czech and German) explains the history of the chapel.

[1] After World War II ended in 1945, a group of volunteers dedicated themselves to restoring the chapel to its former glory.