Grand Duchy of Mecklenburg-Schwerin
The Berlin–Hamburg line, opened in 1846, was the first railway passing through the Grand Duchy of Mecklenburg-Schwerin. Immediately afterwards Mecklenburg-Schwerin began work on a link from Hagenow to Schwerin, which was opened on 1 May 1847. In the following years the line was extended to Wismar, Rostock and Güstrow.