For those unfamilar with the Eurozone: one of its most interesting aspects is the fact that each member state mints its own coins with its own designs on one side, but they can be used and thus circulate across the entire region. So sometimes you check your pocket and find this famous Da Vinci design from Italy, the Irish harp, Athena's owl that was also depicted on Ancient Greek coins more than two millenia ago or, very often, the German eagle. Now that Bulgaria adopted the common currency, it is only a matter of time before every citizen of the zone will have possessed a Bulgarian coin at some point.