The Charter from 1323 states that Vukoslav is the son of duke Hrvatin, and from this we conclude that the main stronghold of the lords of the Donji Kraji was in the town of Ključ, the center of the parish Banica.

In one of his writings, the Ottoman traveler Evliya Çelebi mentions Ključ as being located in Donji Kraji and on the Sana river.

Most of the pre-war Serb population fled after the Dayton Peace Agreement, the town belongs to the Federation of Bosnia and Herzegovina.

In 1991, the municipality of Ključ contained 61 settlements: As a result of the war, the villages of Busije, Crkveno, Čađavica, Donja Previja, Donja Slatina, Donji Ribnik, Donji Vrbljani, Dragoraj, Gornja Previja, Gornja Slatina, Gornje Sokolovo, Gornji Ribnik, Gornji Vrbljani, Rastoka, Sitnica, Sredice, Stražice, Treskavac, Velijašnica, Velije et Zableće, as well as parts of Donje Ratkovo, Donje Sokolovo, Dubočani, Gornje Ratkovo, Jarice, Ljubine et Velečevo became a part of Ribnik municipality, Republika Srpska.

Una-Sana  Central Bosnia Posavina  Herzegovina-Neretva Tuzla  West Herzegovina Zenica-Doboj  Sarajevo Bosnian Podrinje Canton 10