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According to numerous media reports (including Wikinews) the Donauinselfest is Europe's biggest open-air event; with over 3 million visitors. Some 1500 volunteer assistants and visible police presence help make the Donauinselfest one of the most secure big events.
There are some 21 areas (called "islands" as well) that are normally sponsored by radio stations, newspapers and other companies. These are spread out over a 6.5 kilometer area of the total of 21 kilometer island. Musicians of an extremely broad range of genres perform.
The layout is roughly the same every year, with some stages being removed or added. The musicians also tend to come back every year, or being replaced by other ones that are popular.
To ensure safety of visitors, "house rules" were introduced in 2007 and checkpoint controls established to help control certain items (such as glass and liquor inside the festival perimeter.
Food kiosks serve various national and alternative dishes including Thai, Greek, Italian, Indian, Turkish, Vegetarian and Austrian cuisine. Although all concerts are free, financial experts calculate Vienna's economy benefits from this event by almost € 40 million, due to the increased tourism