Subject of the commemorative coin:
 800th anniversary of the discovery of the Postojna Caves
 Description of the design:
 The central image of the coin is a stylised spiral, which begins on the left side of the coin with the inscription “POSTOJNSKA JAMA • 1213–2013 • SLOVENIJA” and ends with two stylised speleothems. The coin’s outer ring depicts the 12 stars of the European flag.