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.
Birds of Canada (banknotes) in the early 1980s and was manufactured at the Bank of Canada roll-coating facility. The iridescent smooth patch would appear in a gradient between gold and green and show the face value of the banknote depending on the viewing angle, had no raised edges, and could not be peeled off the banknote. When photocopied, it would appear as a dark patch. All banknotes in the series were printed with a security ink that would fluoresce blue under ultraviolet light. The banknotes also had a feature causing photocopiers recognizing it to refuse to copy the banknote, and a digital watermark which