The Frederikssund line opened in 1879 as a single-track railway to Frederikssund from Frederiksberg, which at that time was a station on the main line between Copenhagen and Roskilde.
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Frederikssundbanen is one of six radial S-train lines in Copenhagen; it connects the city center with a number of Northwestern suburbs (notably Herlev and Ballerup) and other townships until Frederikssund on the Western coast of the Nordsjælland peninsula.
Countess Feodora Mathilde Helena af Rosenborg (born 27 February 1975 at Frederikssund), married firstly on 31 July 2004 at Holmens Kirke, Copenhagen, Eric Hervé Patrice Patte (born 20 August 1976 at Pont-à-Mousson, France), and divorced in 2005, without issue.