Euro banknotes a common theme of European architecture in various artistic eras. The obverse of the banknote features windows or gateways while the reverse bears different types of bridges. The architectural examples are stylised illustrations, not representations of existing monuments. All the notes of the initial series of euro notes bear the European flag, a map of the continent on the reverse, the name "euro" in both Latin and Greek script (EURO / ΕΥΡΩ) and the signature of a president of the ECB, depending on when the banknote was printed. The 12 stars from the flag are also incorporated into every note.
Euro banknotes "1" would indicate the first column. Banknotes are printed in sheets. Different printers use different sheet sizes and sheets of higher denominations, which are larger in size, would have fewer notes printed per sheet. For example, two German printers print €5 banknotes in sheets of 60 (10 rows, designated "A" to "J" and six columns), the sheets of €10 notes have 54 banknotes (nine rows, six columns), and €20 banknotes are printed in sheets of 45 banknotes (nine rows, five columns). The printer code does not need to be the same as the country code, i.e. notes issued by a