Bijeljina is a city and municipality in northeastern Bosnia and Herzegovina. The city is the second largest in the Republika Srpska entity after Banja Luka and fifth largest city in Bosnia and Herzegovina, and is situated on the flat rich plains of Semberija. Bijeljina is the unofficial center of eastern part of Republika Srpska, with about 120,000-130,000 inhabitants. Bijeljina is located at 6 km (4 mi) from the border of Serbia and 40 km (25 mi) from Croatia. As a prolific lowland city makes one of the centers of production and trade of food. Bijeljina is recognized by the vast central square, which increases the beauty of a pleasant ambience of the City Park.
In the area of Bijeljina municipality so far ratified the oldest traces of human life come from the New Stone Age (5000 – 3000 years BC). Also there were found remains from the Neolithic period, Bronze and Iron Ages and antiquity. Investigated the sites of Gradac and farm in Batkovic, Glavičica, Kučerina the courts, Village in Kojčinovac, boats in the Triješnici, and from the ancient period was investigated at the site of a Roman villa in Prekaja Brodac, and in the Obarska the lead plates found in the cult uses to play 'Danubian horseman'.