Frankfurt is a very international city. Every third inhabitant is not German. Most immigrants come from southeastern Europe, Turkey and North Africa, but there are people from almost every country living in Frankfurt. There are also many international business companies here, and the big airport links Frankfurt with many countries in the world. Many banks are based in Frankfurt, which is why so many are offered there. Frankfurt has some of the tallest buildings in Europe, which is why the city is although called "Mainhattan".