10 euro note about 1.5 years before it is replaced due to wear. It is the second-smallest note measuring 127x67 mm with a pink colour scheme. The ten euro banknotes depict bridges and arches/doorways in Romanesque architecture (between the 11th and 12th centuries). The ten euro note contains several complex security features such as watermarks, invisible ink, holograms and microprinting that document its authenticity. The euro was founded on 1 January 1999, when it became the currency of over 300 million people in Europe. For the first three years of its existence it was an invisible currency, only used in accountancy. Euro cash
European Currency Unit (U+20A0), comprises an interlaced C and E, which are the initial letters of the phrase 'European Community' in many European languages. However, this symbol was not widely used: few systems at the time could render it and in any case banks preferred (as with all currencies) to use the ISO code XEU. As the ECU was only an electronic unit of account and not a full currency, it did not have any official coins or notes that could be used for everyday transactions. However, various European countries and organisations like the European Parliament made commemorative and mock-up coins and notes.