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The Lauenburg-Hohnstorf Ferry (German: Trajekt Lauenburg-Hohnstorf or Lauenburg-Hohnstorfer Elb-Traject-Anstalt) was a railway ferry over the River Elbe between Hohnstorf on the left bank of the Elbe in the old Kingdom of Hanover (which became the Prussian province of Hanover in 1866) and Lauenburg in the Duchy of Lauenburg on the right bank which was then part of Denmark.