The name kreisfreie Stadt (plural: "kreisfreie Städte") is used for German towns that have their own government. This town government is independent of the government of the next-higher level of authority, the "Landkreis". Today, most of the cities that have this statute, are big cities, with 100.000 people living there, or more. The concept grew historically. That means that there are big cities, with more than 100.000 people that do not have the statute. There are also some cities who have only taken a part of the responsibilities of a Landkreis (or Kreis). The smallest city with the statute is Zweibrücken. About 35.000 people live there. The biggest of these cities is Munich, with about 1.3 million people. Hamburg and Berlin are bigger. They are city states, though. The city state of Bremen (state) is made of two "kreisfreie Städte", the city of Bremen, and the city of Bremerhaven, about 60 km to the north. About half a million people live in Bremen (1.5 million in the agglomeration), about 117.000 people live in Bremerhaven.