Reserve currency economy, the German Deutsche Mark gained the status of the second most important reserve currency after the US dollar. When the euro was introduced on 1 January 1999, replacing the Mark, French franc and ten other European currencies, it inherited the status of a major reserve currency from the Mark. Since then, its contribution to official reserves has risen continually as banks seek to diversify their reserves, and trade in the eurozone continues to expand. Former U.S. Federal Reserve Chairman Alan Greenspan said in September 2007 that the euro could replace the U.S. dollar as the world's primary reserve currency.
Romania and the euro law requires that the coat of arms of the country be used on coin designs. In Romanian, the currency is called "euro" , and its subunit "eurocent" . Romania and the euro Romania is required by its EU accession agreement to replace the current national currency, the Romanian leu, with the euro, as soon as Romania fulfills all of the six nominal euro convergence criteria. The leu is not yet part of the European Exchange Rate Mechanism (ERM II), of which minimum two years of stable membership is one of the six nominal convergence criteria to comply with to qualify