Bulgarian National Bank | 4,653 followers on LinkedIn. The Bulgarian National Bank is one of the oldest national institutions established right after the restoration of the Bulgarian state, on January 25, 1879, and on 6 of June of the same year the first banking operation was conducted. According to the Constitution of the Republic of Bulgaria (article 29) the BNB is an independent issuing institution of the State reporting to the National Assembly. It plays a key role in the Bulgarian economy and takes care of maintaining the stability of the Bulgarian currency, and of strengthening and development of the banking and credit system in the country.