The Old Town of Visoki [ʋǐsoki:] was a medieval royal castle town built during the fourteenth century, located on the top of the hill overlooking town of Visoko, Bosnia and Herzegovina. The first mention of the town was on 1 September 1355, in the charter "in castro nosto Visoka vocatum" written by Tvrtko I of Bosnia while he was a young ban. The town was abandoned before 1503, because it is not mentioned in the Turkish-Hungarian treaty from the mentioned year.