Luxembourg is one of the ''de facto'' capitals of the European Union (alongside Brussels, Frankfurt and Strasbourg), as it is the seat of several institutions, agencies and bodies, including the Court of Justice of the European Union, the European Court of Auditors, the Secretariat of the European Parliament, the European Public Prosecutor's Office, the European Investment Bank, the European Investment Fund, the European Stability Mechanism, as well as amongst other European Commission departments and services, Eurostat. The Council of the European Union meets in the city for three months annually.