Bank For International Settlements - BIS

What Does Bank For International Settlements - BIS Mean?
An international organization fostering the cooperation of central banks and international monetary policy makers. Established in 1930, it is the oldest international financial organization, and was created to administer the transaction of monies according to the Treaty of Versailles. Among others, its main goals are to promote information sharing and to be a key center for economic research.

Investopedia explains Bank For International Settlements - BIS
Essentially, the BIS is a central bank for central banks; it does not provide financial services to individuals or corporations. The BIS is located in Basel, Switzerland, and has representative offices in Mexico City and Hong Kong. Member banks include the Bank of Canada, the Federal Reserve Bank and the European Central Bank.