Mostly, the Euro (EUR) although a few countries still have their own currency (i.e. Switzerland still uses its own Franc - CHF).
The Euro
the currency is what money type the country has - us dollar, pound, kronur
Dollar and Euro
No currency can be said to be the currency of most European countries. The Euro is the currency of 17 countries in Europe, but there are around 50 countries in Europe. So the Euro is the currency...