Ključ, Gacko
Ključ () is a village in the municipality of Gacko, Republika Srpska, Bosnia and Herzegovina. Geography The Village is located southwest of Gacko. It is separated from Gatačko polje by the Baba mountain (1,737 m). This mountain borders the Ključ-Cernik valley from the north, and Kameno brdo from the south. Considering that the mentioned hills protect the valley, the climate here is milder than in other areas in Gatačko polje and around Gacko. There are also several springs in Kljuc. History Middle Ages The settlement has a historical area - the Old Town of Ključ and the Ključ Mosque (Ajnebeg-dede Mosque, the Mosque of Ključ Captains or Starica) with a harem in Ključ, which has been declared a national monument of Bosnia and Herzegovina. [2] In 1373, the Serbian prince Lazar Hrebeljanović and the Bosnian ban Tvrtko divided the lands of Nikola Altomanović. In that division, the area of Gacko belonged to the Bosnian ban Tvrtko. The first written document in which the town of Ključ is mentioned in the charter of Sandalj Hranić from 28 December 1410. In a broader sense, the suburb of Ključ was Cernica, which developed from a caravan station into a square with a customs