Poljica Republic by the river Cetina

The Poljica Republic or duchy (Croatian: Poljička republika, in older form "Poljička knežija") was an autonomous community which existed in the late Middle Ages and the early modern period in central Dalmatia, near modern-day Omiš, Croatia.
It was organized as a "peasants' republic", and it's best known because of the Poljica Statute first written in 1440.

Gourmand attraction Poljićki soparnik is still live remaining of that time: