The Danevirke: The Mightiest Border Rampart of the North

The Danevirke (Danish Danevirke, "work of the Danes") is a system of ramparts, ditches and walls that sealed off the isthmus between the North Sea and the Baltic – exactly where the Jutland peninsula is narrowest. It protected the Danish heartland against attacks from the south, above all against the Franks and Saxons. Together with the nearby trading place Haithabu it formed one of the most important axes of power in the Viking Age.

A rampart across centuries

The Danevirke was not built at once but extended again and again over centuries. Dendrochronological studies (dating by tree rings) have shown that the oldest sections arose as early as around 737 – generations before the great Viking raids. Later phases followed, right up to the famous brick Waldemar Wall of the 12th century.

King Godfred and the Franks

Around 808 the Danish king Godfred had the Danevirke strengthened against Charlemagne – the Royal Frankish Annals report it. It was the direct answer to Charlemagne's conquest of Saxony: the new great power in the south now stood right on the Danish frontier. The Danevirke was thus not only a structure but a political statement in earth and timber.

The border, the gate and trade

The wall had a single great gate – the Wiglesdor. Through this gap ran the overland trade: from here the Ox Road led south, and across the short land bridge between the Schlei and the Treene goods were carried between the Baltic and the North Sea. Whoever controlled the border and the gate controlled trade – and collected toll.

"… he decided to fortify the border of his kingdom against Saxony with a rampart."after the Annales regni Francorum for the year 808 (public domain, own translation)

UNESCO World Heritage

In 2018 the Danevirke and Haithabu were jointly declared a UNESCO World Heritage Site. So one of the most impressive Viking monuments in the world stands on German soil. Large parts of the rampart are still visible in the landscape today, along with a museum on the wall itself.

The Danevirke shows that the Viking Age was also an age of mighty structures – and that this history does not play out somewhere in the far North, but right on one's own doorstep.

Read more with us

Hedeby · Viking traces in Germany · The North Frisian ring forts · Reric · The Ox Road.

Sources & literature

Annales regni Francorum (808); Archaeological State Office of Schleswig-Holstein; UNESCO World Heritage "Haithabu and Danevirke" (2018); dendro-datings; quote public domain or own translation.

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