 According to historians in the 10th century Belhorod was part of Kievan Rus’, later it was owned by the Kingdom of Hungary, and then the Principality of Galicia–Volhynia where it stayed up to the invasion of the Mongols.It is not known when Bilhorod-Dnistrovskyi fortress was founded.Now most historians believe that it was Republic of Genoa trading enclave on Black Sea first established in the 13th century.