In Ptolemy's time the Chauci lived in the area now called north-western Germany or Lower Saxony.
But in reality Bremen did not have complete independence from the Prince-Archbishops: there was no freedom of religion, and burghers still had to pay taxes to the Prince-Archbishops.
Bremen played a double role: it participated in the Diets of the neighbouring Prince-Archbishopric of Bremen as part of the Bremian Estates and paid its share of taxes, at least when it had previously consented to this levy.
Bremen is the second most populous city in Northern Germany and eleventh in Germany.
Bremen is a major cultural and economic hub in the northern regions of Germany.
Since the city was the major taxpayer, its consent was generally sought. Around this time the Hansekogge (cog ship) became a unique product of Bremen.
In this way the city wielded fiscal and political power within the Prince-Archbishopric, while not allowing the Prince-Archbishopric to rule in the city against its consent. In 1362, representatives of Bremen rendered homage to Albert II, Prince-Archbishop of Bremen in Langwedel.Property was to be freely inherited without feudal claims for reversion to its original owner.This privilege laid the foundation for Bremen's later status of imperial immediacy (Free Imperial City).The marshes and moraines near Bremen have been settled since about 12,000 BC.Burial places and settlements in Bremen-Mahndorf and Bremen-Osterholz date back to the 7th century AD.Since the Renaissance, some scientists have believed that the entry Fabiranum or Phabiranon in Ptolemy's Fourth Map of Europe, written in AD 150, refers to Bremen.