 The known history of Prozor Fortress begins parallel with the history of Vrlika in the 7th century, when the Croats moved there and formed a village on the spring of the river Cetina, in a field below the mountain Dinara.In the 9th century probably during the time of Duke Branimir of Littoral Croatian Duchy, the old Croatian Catholic St. Saviour () was built near Vrlika, then called "Vrh Rike".After the crowning of Ladislaus as the Hungarian King in Zadar in 1403, and in political maneuvering against his arch political rival and enemy, king Sigismund, he appointed Hrvatinić as his deputy for Croatia and Dalmatia as he promised earlier.