Slovak euro coins
Slovakia has been a member of the European Union since May 2004, and is a member of the European Economic and Monetary Union. Slovakia adopted the euro on 1 January 2009, replacing its previous currency, the Slovak koruna.
Heller (money)
The term heller (, ) was also used for a coin valued at 1/100 of a koruna (crown) in the Czech Republic (Czech koruna) and Slovakia (Slovak koruna), as well as in former Czechoslovakia (Czechoslovak koruna).