100 euro note has a green colour scheme. The hundred euro notes depict bridges and arches/doorways in the Baroque and Rococo style (between the 17th and 18th century). The hundred euro note contains several complex security features such as watermarks, invisible ink, holograms and microprinting that document its authenticity. The new banknotes of the Europa series 100 euro banknote will start circulating on 28 May 2019. 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.
History of the euro support the euro in 2001. Later in 2000, Denmark held a referendum on whether to abandon their opt-out from the euro. The referendum resulted in a decision to retain the krone, and also set back plans for a referendum in the UK as a result. The procedure used to fix the irrevocable conversion rate of 340.750 between the Greek drachma and the euro was different, since the euro by then was already two years old. While the conversion rates for the initial eleven currencies were determined only hours before the euro was introduced as a virtual currency, the conversion rate