Knud Karl Krogh-Tonning (1842–1911), Norwegian theologian, was born in Stathelle
According to the Schleswig-Holstein National Park Office in Tönning, Blauort, like the sandbank of Tertius to the south, belongs to the parish of Hedwigenkoog.
It is approximately 30 km in length and 15 km in width and has been created through diking (polders) from three islands: Eiderstedt around Tönning, Utholm around Tating, and Evershop around Garding.
In 1886 a connection was built between Platenhörn on the Husum–Tönning line and a junction at Hörn on a new extension of the Marsh Railway from Heide to Husum, which ran a little to the east of the Tönning line.
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A major reason for the creation of a rail link between the Baltic port of Flensburg and the North Sea ports of Husum and especially Tönning on the Eider estuary was the export of live cattle to England.
His forces occupied the islands Nordstrand and Pellworm and Hammer took part in the defense of the then Danish towns of Tönning and Friedrichstadt.