The Weser had long been an important trade route, and the legal regulation of trading had immense significance. In 1552 Emperor Charles V conferred the privilege of its merchants' unhindered trading on the whole Weser to the town of Minden. During the Thirty Years' War, Emperor Ferdinand II confirmed the staple right to Minden in 1627, meaning that all passing merchants had to offer their goods for sale for some days. As other towns on the Weser - like Bremen or Münden - had similar rights, many conflicts arose about the partly contradictory legal positions.
