Frankfurt am Main, commonly known simply as Frankfurt, is the largest city in the German state of Hesse and the fifth-largest city in Germany, with a 2008 population of 670,000. The urban area had an estimated population of 2.26 million in 2001. The city is at the centre of the larger Frankfurt/Rhine-Main Metropolitan Region which has a population of 5.3 million and is Germany's second largest metropolitan area.Situated on the Main River, Frankfurt is the financial and transportation centre of Germany and the largest financial centre in continental Europe. It is seat of the European Central Bank, the German Federal Bank, the Frankfurt Stock Exchange and the Frankfurt Trade Fair, as well as several large commercial banks. Frankfurt Airport is one of the world's busiest international airports, Frankfurt Central Station is one of the largest terminal stations in Europe, and the Frankfurter Kreuz (Autobahn interchange) is the most heavily used interchange in continental Europe. Frankfurt is the only German city listed as one of ten Alpha world cities. Frankfurt lies in the former American Occupation Zone of Germany, and it was formerly the headquarters city of the U.S. Army in Germany.

A major festival in the city is the Museumsuferfest (Museums Riverbank Festival). It is one of the biggest cultural festivals in Germany which attracts more than 3 million visitors over a period of 3 days. It takes place yearly at the end of August on both sides of the Main Riverbank in the city centre. More than 20 museums are located there and they are open far into the night. Furthermore there are special attractions like live-bands, dance shows, several booths for crafts, jewelry, clothes and food from all around the world. It ends with a spectacular firework display .Frankfurt's oldest folk festival is the Dippemess (Festival of Stoneware) which takes place twice a year around Easter and the end of September in the eastern part of the city. Mentioned for the first time in the 14th century as an annual marketplace it is now more of an amusement park. ("Dippe" is a regional hessian dialect word meaning "pot" or "jar" and which would not be understood in most other German regions. The name of the festival derives from its original purpose, when it was a fair where traditionally crafted jars, pots and other stoneware were offered)The Frankfurt Wäldchestag (Woods Day) is jocularly known as a regional holiday because until the 1990s it was common that Frankfurt's shops were closed on this day. Despite the name, the festival takes place over a period of four days after Pentecost with the actual Wäldchestag being Tuesday. What is special about this festival is its location in Frankfurt's city forest, south of the city centre in Niederrad.

The Wolkenkratzer Festival (Skyscraper Festival) is unique in Germany. It takes place irregularly, the last time in May 2007. For two days most of the skyscrapers in downtown Frankfurt are open to the public, which is normally not the case, apart from the Maintower observation deck. Around 1.2 million visitors took the opportunity to see the city from above. Sky-divers, base jumpers, fireworks and laser shows were extra attractions. The next festival will not be held before 2010.The Sound of Frankfurt is a music festival held in the city centre. It took place regularly from 1994 to 2004. Various artists and bands performed open-air and for-free concerts on eight stages located mainly around the Zeil. Different types of music (rock, Latino, house, alternative and pop) attracted about 500,000 visitors each year.