Central banks serve as the lender of last resort and money manager for countries. The Bank of England is the oldest central bank, established in 1694. There are nearly 150 central banks globally. The Reserve Bank of India (RBI) was established in 1935 by amalgamating three presidency banks. As the central bank of India, the RBI is charged with managing the country's money supply and credit levels to promote public welfare. It functions as the banker to the government and banks, and controls functions like currency issuance, foreign exchange reserves, and interest and exchange rates. The RBI was initially owned privately but was nationalized in 1949.