"Our Union is more than an association of states. It is a new legal order, which is not based on the balance of power between nations but on the free consent of states to share sovereignty. From pooling coal and steel, to abolishing internal borders, from six countries to soon twenty-eight with Croatia joining the family this has been a remarkable European journey which is leading us to an “ever closer Union”. And today one of the most visible symbols of our unity is in everyone’s hands. It is the Euro, the currency of our European Union. We will stand by it."
January 1, 1970
https://en.wikiquote.org/wiki/Euro