In the vicinity of the city Brańsk was discovered particularly valuable findings constitute the Neolithic tombs from the amphora culture, the oldest in this part of Poland skeleton burial, and the treasure containing bronze adornments from Lusatian culture. The settlement, today referred to as Zamczysko (Eng. ‘castle’), built between the 10th and 11th centuries at the bifurcation of the rivers Nurzec and Bronka gave rise to Brańsk.