. Frankfurt city Information Population Frankfurt is a multicultural city. Most immigrants are from Turkey, the former Yugoslavia, or Italy. About 175 different nationalities reside in Frankfurt. For a long time Frankfurt was a Protestant-dominated city. However, during the 19th century an increasing number of Catholics moved to the city. Today a narrow plurality of citizens are Catholic. Frankfurt has the second largest Jewish community (after Berlin) in Germany. Geographic location The city is located on both sides of the Main River. The southern part of the city contains the Frankfurt City Forest (Frankfurter Stadtwald) Germany's largest urban forest. Festivals Frankfurt hosts several festivals, fairs, and carnivals throughout the year. The most famous is the Rheingau-Music-Festival with many (mostly classical) concerts at castles and under the open sky surrounded by vineyards. It takes place each May. Another major festival, which takes place in Frankfurt, is the "Museumsuferfest"; "Museum-Riverbank-Festival". It is one of the biggest cultural festivals in Germany, which offers the opportunity to see, buy, smell, taste and hear new things from all around the world. The festival takes place yearly at the end of summer and attracts an average of 3 million visitors. The festival goes over a period of 3 days and ends with a spectacular show of fireworks. Frankfurt ist also known for having one of the greatest red light districts in Germany in vicinity of the main train station. More about Frankfurt .