Bor (Serbian Cyrillic: Бор) is a town, municipality and the administrative center of the Bor District in eastern Serbia. It has one of the largest European copper mines - RTB Bor. It has been a mining center since 1904, when a French company began operations there. It is the administrative center of the Bor District of Serbia. The population of the town is 34,160, while municipality has 48,615.