The euro area, commonly called the eurozone (EZ), is a currency union of 20 member states of the European Union (EU) that have adopted the euro (€) as their primary currency and sole legal tender, and have thus fully implemented Economic and Monetary Union policies.
The 20 eurozone members are:Austria, Belgium, Croatia, Cyprus, Estonia, Finland, France, Germany, Greece, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Portugal, Slovakia, Slovenia, and Spain.
The European Stability Mechanism (ESM) is an intergovernmental organization located in Luxembourg City, which operates under public international law for all eurozone member states having ratified a special ESM intergovernmental treaty. It was established on 27 September 2012 as a permanent firewall for the eurozone, to safeguard and provide instant access to financial assistance programmes for member states of the eurozone in financial difficulty, with a maximum lending capacity of €500 billion. It has replaced two earlier temporary EU funding programmes: the European Financial Stability Facility (EFSF) and the European Financial Stabilisation Mechanism (EFSM).