The marshes and moraines near Bremen have been settled since about 12000 BC. Burial places and settlements in Bremen-Mahndorf and Bremen-Osterholz date back to the 7th century AD. In 150 AD the geographer Ptolemy refers to Fabiranum or Phabiranum, known today as Bremen. At that time the Chauci lived in the area now called north-western Germany or Lower Saxony. By the end of the 3rd century, they had merged with the Saxons. During the Saxon Wars (772�804) the Saxons, led by Widukind, fought against the West Germanic Franks, the founders of the Carolingian Empire, and lost the war.
Charlemagne, the King of the Franks, made a new law, the Lex Saxonum. This law stated that Saxons were not allowed to worship Odin (the god of the Saxons), but rather that they had to convert to Christianity on pain of death. This period was called the Christianisation. In 787 Willehad of Bremen was the first Bishop of Bremen. In 848 the diocese of Hamburg merged with the diocese of Bremen, and in the following centuries the bishops of Bremen were the driving force behind the Christianisation of north Germany. In 888 Archbishop Rimbert, managed to get Kaiser Arnulf of Carinthia, the Carolingian King of East Francia, to grant Bremen the right to hold its own markets, to mint its own coins and make its own customs laws.
The first stone city walls were built in 1032. Around this time trade with Norway, England and the northern Netherlands began to grow, thus increasing the importance of the city.
In 1186 the Bremian Prince-Archbishop Hartwig of Uthlede and his bailiff in Bremen confirmed � without generally waiving the prince-archiepiscopal overlordship over the city � the Gelnhausen Privilege, by which Frederick I Barbarossa granted the city considerable privileges. The city was recognised as a political entity with its own laws. Property within the municipal boundaries could not be subjected to feudal overlordship; this also applied to serfs who acquired property, if
