All denominations of Greek euro coins were designed by Georgios Stamatopoulos. The 1-cent coin depicts a trireme. This was an oar-powered warship of the ancient world with three banks of rowers. From the 6th to the 3rd century BC it was the most important warship of Mediterranean naval powers.
Euro coins and banknotes were introduced on 1 January 2002 in twelve countries. Today, the euro area has grown to include 18 countries. Euro coins feature a common design on one side. Also, the national side (reverse) of every coin includes a ring of 12 stars from the European Union flag. Each country has its own design for the national side of its coins.