This is the national currency of the Eurozone. It appeared in 1999, and came into circulation in 2002. Since then the euro is considered the main currency in 17 EU countries: Austria, Belgium, Germany, Greece, Ireland, Spain, Italy, Cyprus, Luxembourg, Malta, the Netherlands, Portugal, Slovakia, Slovenia, Spain, France and Estonia. Interestingly, private courses of currencies of these countries regarding the euro are fixed and will never change. The euro is represented by EUR in the Forex market (see), when paired with the U.S. dollar (see) EUR/USD it's one of the most popular tools for trade. More than half of all transactions in the Forex market are held with the participation of EUR / USD. The euro is controlled by the European Central Bank (ECB - see), which is located in Frankfurt.