Euro

As European as electronic music and shirts unbuttoned to the naval. It's the currency of the European Union, though not every EU country gets to use it.

First introduced in 1999 to facilitate trade among the major European countries, the euro is now used (as of 2018) in 19 countries. This block is known as the eurozone, and includes Germany (where it replaced the mark), France (where it replaced the franc), Italy (where it replaced the lira), Ireland (where it replaced the pound) and Spain (where it replaced the peseta).

Other countries in the eurozone include Austria, Belgium, Cyprus, the Netherlands, Estonia, Finland, Greece, Latvia, Lithuania, Luxembourg, Malta, Portugal, Slovakia, Slovenia, San Marino, Monaco, and the Vatican.

Greece really tried to get itself kicked out around 2010...a debt crisis in the country brought to light evidence that it basically lied about its economic health in order to get let into the euro in the first place. The other countries in the Eurozone helped bail it out though, and it continued to use the currency even after the crisis.