500 euro note rapidly so that in the first 7 years (up to December 2008) there were 530,064,413 five hundred euro banknotes in circulation. Subsequently, the rate of increase was radically slowed. In August 2018, there were approximately 515,000,000 banknotes in circulation (decreased from 614,000,000 in 2015). It is the second least widely circulated denomination, accounting for 2.4% of the total banknotes. It is the largest note measuring 160 × 82 mm and has a purple colour scheme. The five hundred euro banknotes depict bridges and arches/doorways in modern architecture (around the late 20th century). The five hundred euro note contains several complex
Banknotes of the Republic of Ireland prefix "T" on the serial number. A further complication is that the actual printing of banknotes is not necessarily undertaken in the country in which banknotes are given a serial number and released. The Central Bank of Ireland is the sole Irish printer of euro banknotes (in some other Eurozone countries, notes are printed by a private company commissioned to do so by the central bank, rather than the central bank itself). Any notes printed by the Central Bank of Ireland will have the prefix "K" before the series code in a small star on the front of the banknote.