The Skull Chapel (Polish: Kaplica Czaszek) is an ossuary chapel located in the Czermna district of Kudowa-Zdrój, in southwestern Poland. 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. The Skull Chapel is the only such monument in Poland, and one of five in Europe.