Dresden Basin between 2004 and 2009 by UNESCO due to their cultural and natural significance. During the East German era, the Basin was jokingly referred to by its inhabitants as the Valley of the Clueless, because they were not able to receive West German television until the late 1980s, and then only patchily. The most important towns and cities are (in downstream order): Dresden Basin The Dresden Basin ( or "Dresdner Elbtalweitung") is a roughly 45 km long and 10 km wide area of the Elbe Valley between the towns of Pirna and Meißen. The city of Dresden lies in the Dresden
Accession of Hamburg to the German Customs Union (Zollverein) form a wider more powerful entity. The states which joined fought vigorously against any impairment of their full sovereignty. Hence each member had a veto and the union was not permanent, but had to be renewed after 12 years. Each member sought its own economic advantage. Accordingly, the accession of any of the Hanseatic cities of Hamburg, Bremen or Lübeck would have to be on condition that accession served the city's own advantage. A pre-condition of such advantage was that their territory touched directly with that of the Customs Union, which only happened for Hamburg after 1854, when Hanover joined.