The conceptual phase of the creation of the euro banknotes began in February 1996, when the European Monetary Institute (EMI), the forerunner of the ECB, launched a design competition. A total of 44 design proposals were submitted, and in September 1996 a jury of independent experts in marketing, advertising, design and art judged the designs. The jury drew up two shortlists: one of five design series on the "Ages and styles of Europe" theme and another of five design series on a "Modern/abstract" theme.
A European market and opinion research organisation was then commissioned to carry out a survey of public acceptance of the shortlisted designs. Around 2,000 individuals participated throughout Europe. Taking account of the advice given by the jury and the results of the public consultation, the EMI Council selected, in December 1996, the series submitted by Robert Kalina, a banknote designer at the Oesterreichische Nationalbank. His design was inspired by the theme "Ages and styles of Europe" and depicted the architectural styles of seven periods in Europe's cultural history. These styles are shown on the seven euro banknotes:
On the front of the banknotes, windows and doorways symbolise the European spirit of openness and cooperation. The 12 stars of the European Union represent the dynamism and harmony of the European nations. To complement these designs, the reverse of each banknote features a bridge. The bridges symbolise the close cooperation and communication between Europe and the rest of the world. The images are based on the typical architectural style of each period, rather than on specific structures. These designs, and the following features, are presented in more detail in the euro banknote pictures opposite: