In the Iron Age, the area between the Zeta and Bjelopavlići valleys was occupied by two Illyrian tribes, the Labeates and the Docleatae. The population of the town of Doclea was 8,000–10,000, in which all core urban issues were resolved. The high population density (in an area of about  radius) was made possible by the geographical position, favorable climate, and economic conditions and by the defensive positions that were of great importance at that time.