The EU is run by a number of bodies called institutions, which have different roles. The most important of these are the European Commission which proposes new laws, the European Council where national leaders meet, the Council of the European Union where member country ministers meet, and the European Parliament.
The judicial branch of the EU is the Court of Justice of the European Union. A separate institution overseeing spending from other EU bodies is the Court of Auditors. Banking across the euro countries is controlled by the European Central Bank. Lesser known institutions include the Economic and Social Committee, the Committee of the Regions, the European Investment Bank (which manages the European Investment Fund) and the EU Ombudsman.