Rungholt – Drowned Wadden Sea Trading Town, North Frisia
Rungholt · Edomsharde Rungholt · Wadden Rungholt
Medieval (1150–1362 CE)·Frisian / Danish·🇩🇪 Schleswig-Holstein, Nordfriesland, Wadden Sea, Germany
About
About Rungholt – Drowned Wadden Sea Trading Town, North Frisia
Rungholt was the chief town of the Edomsharde marsh district on the Frisian coast, drowned in the Grote Mandrenke (St Marcellus flood) 15–16 Jan 1362 along with 15–30 parishes. 5 m in the tidal flats, 12 km off modern Südfall island. The town exported salt (from peat), wool and herring; sluices and sea dikes (11 km ring dike) failed at 6 m storm surge. 5 m, worsening drowning. Mythic 'Atlantis of the North Sea' with bells heard at low tide; UNESCO Wadden Sea integrity protects the flats.
Why it mattersLargest storm-drowned medieval marsh town in Europe; proves peat salt extraction subsidence + dike failure model for 1362 Mandrenke.
Open questions
Mysteries & theories
Mysteries
- 01How many parishes truly drowned vs mythic 21
- 02Whether harbour channel was natural tidal creek canalised
Theories
- 01Peat salt burning lowered marsh 1.5 m making 1362 flood fatal (salt subsidence hypothesis)
- 02Dike age and under-investment after Hanse herring decline caused breach
Theories are interpretations, not findings. The seal above tells you how much scholarly weight the place carries.
History
How it came to be
- Built
- c. 1150 marsh diked settlement; port 13th c.
- Period
- Medieval (1150–1362 CE)
- Culture
- Frisian / Danish
- Builders
- Frisian dikers
- Purpose
- Marsh salt, wool and herring port within Hanse fringe
- Abandoned
- 16 Jan 1362 Grote Mandrenke storm surge drowns town
- Rediscovered
- 1362 survivors note; 1921 Andreas Busch stakes; 2023 CAU geophysics
- Excavation
- Partially excavated
c. 1150
Edomsharde diked; Rungholt terp raised
1362-01-16
Grote Mandrenke 6 m surge breaches dikes, drowns Rungholt and 21 parishes
1921
Busch marks terps in mudflats at low tide
2023
CAU Kiel magnetometry maps church terp and harbour channel at -1.5 m
On the ground
Structures & features
54.4833° N · 8.6833° E · -2 m · 2 mapped features
Rungholt church terp (40x15 m)
churchBrick church terp 2.2 m high at −1.5 m in mudflats
54.4840° N · 8.6840° ENorderoog harbour channel
harbour40 m wide harbour tidal channel at −1.5 m
54.4820° N · 8.6810° E