Bank of Spain, also known as Banco de España, functions as the national central bank and supervisor for the Spanish banking system. Because of its affiliations with the European Systems of Central Banks, it also defines and implements the Eurosystem’s monetary policy, conducts currency exchange operations, promotes the sound working of payment systems, and issues legal tender banknotes. The site provides information about the bank's services and the Eurosystem, legislation, publications, and press releases.