Biblical scene, Wieliczka Salt Mine. Bas-relief carving in salt depicting Leonardo da Vinci's The Last Supper, based on the story from the Christian bible. This carving, in the chapel of Saint Kinga, in the Wieliczka Salt Mine, was done in the period 1927-1963 by the miner and sculptor Antoni Wyrodek. The salt mine at Wieliczka, Poland, is one of the oldest in the world. It was started in the 13th century and is still in use in the 21st century. By the 19th century, vast underground caverns had been excavated to depths of several hundred metres, including statues sculpted out of the salt deposits. In 1978, the mine became a UNESCO World Heritage Site.