View of massive fortification walls of the Town castle in Kremnica during summer with tower of Church of Saint Catherine. The castle of Kremnica is first mentioned in 13th century. Kremnica is well-preserved medieval town built above important gold mines. Kremnica town is the site of the oldest still-working mint in the world. Kremica is aspiring to be inscribed in the UNESCO List of Natural and Cultural Heritage. By Boris Jaroscak.