Euro area
The currency of the euro area is the euro, and its central bank is the European Central Bank. Each country of the area has a National Central Bank that participates in the Eurosystem.
Four European microstates participate in the euro area through monetary agreements with the EU, granting them the rights to produce limited quantities of euro coins with their own design on the national side, but not to issue euro banknotes. These countries' financial authorities, whether named central banks or not, are primarily supervisory authorities.
Andorra: Andorran Financial Authority 
Monaco: Commission de Contrôle des Activités Financières 
San Marino: Central Bank of San Marino 
Vatican City: Institute for the Works of Religion
Two additional countries have adopted the euro unilaterally, and are not technically part of the euro area even though they use the euro as their currency. [1]
