The eurozone is an Economic and Monetary Union (EMU) of 17 European Union (EU) member states that have adopted the euro (€) as their common currency and sole legal tender.
Monetary policy of the zone is the responsibility of the European Central Bank (ECB) which is governed by a president and a board of the heads of national central banks. The principal task of the ECB is to keep inflation under control. Though there is no common representation, governance or fiscal policy for the currency union, some co-operation does take place through the Euro Group, which makes political decisions regarding the eurozone and the euro. The Euro Group is composed of the finance ministers of eurozone states, however in emergencies, national leaders also form the Euro Group.