Prnjavor (, ) is a town and municipality located in Republika Srpska, an entity of Bosnia and Herzegovina, between cities of Banja Luka and Doboj. According to the 2013 census, the town has a population of 8,120 inhabitants, with 35,956 inhabitants in the municipality. Geography Physical geography The municipality is located in the basin of the Ukrina river and is characterized by a mostly lowland hilly terrain configuration with the highest peak of 594m (mountain Ljubić). The Municipality of Prnjavor is shielded on all sides by low mountains such as Ljubić (south) and Motajica (north). The town of Prnjavor is located at an altitude of 185m. Other thant the river Ukrina which forms in the Municipality of Prnjavor by merging of the Big and Small Ukrina near the village of Kulaši, there are also the rivers of Vijaka and Lišnja and various other streams. On the river Vijaka in the foothills of Ljubić there is a man made lake Drenova and further downstream there are Ribnjak fishing grounds. Political geography The municipality is located in the northern part of Republika Srpska and borders the municipalities of Derventa, Stanari, Teslić, Čelinac, Laktaši and Srbac. It has an area of 629.99 km2 and makes up 2,568% of the total territory of the Republika Srpska. Climate The area of the municipality belongs to the zone of temperate continental climate with moderately cold winters (average temperature in January 1 °C) and moderately warm summers (average temperature in July 31 °C). The average number of total hours of sunshine in the municipality of Prnjavor is 1,600 hours. The average annual rainfall is about 950 mm, and is evenly distributed throughout the year. History Middle Ages Even over 700 years ago people recognized the economic potential of the area of the present-day Municipality of Prnjavor. Although there had been some settlements from the Roman period here, significant colonization and settlement (including the construction of monasteries, such as the one of at Stuplje) took place only in the Middle Ages. According to historical sources, medieval monasteries had their landed properties called Prnjavori, and the locals living there were called Prnjavorci. This is believed to be the origin of the name Prnjavor. Ottoman era During the Ottoman period the region suffered from border conflicts with the Austrian Empire. A significant number of Bosnians converted to Islam after the conquest by the Ottoman Empire in the second half of