The Serbian rulers King Stephen Uroš III (in 1326) and Emperor Stephen Dušan (in 1348, 1355) mentioned many of the Opolje and Gora villages in their charters, which shows that they existed before those dates.
Historical records from the Serbian rulers King Stephen Uroš III (in 1326) and Emperor Stephen Dušan (in 1348, 1355) confirm the existence of Opolje and Gora villages prior to these mentioned dates.