Heligoland in the context of "North Frisia"

The Treaty of Kiel (Danish: Kieltraktaten) or Peace of Kiel (Swedish and Norwegian: Kielfreden or freden i Kiel) was concluded between the United Kingdom of Great Britain and Ireland and the Kingdom of Sweden on one side and the Kingdoms of Denmark and Norway on the other side on 14 January 1814 in Kiel. It ended the hostilities between the parties in the ongoing Napoleonic Wars, where the United Kingdom and Sweden were part of the anti-French camp (the Sixth Coalition) while Denmark–Norway was allied to the French Empire.

Frederick VI of Denmark joined the anti-French alliance, ceded Heligoland to George III of the United Kingdom, and further ceded the Kingdom of Norway to Charles XIII of Sweden in return for Swedish Pomerania. Specifically excluded from the exchange were the Norwegian dependencies of Greenland, Iceland and the Faroe Islands, which remained in the union with Denmark. (Norway would unsuccessfully contest the Danish claim to all of Greenland in the Eastern Greenland Case of 1931–1933.)

The Frisian languages (/ˈfriːʒən/ FREE-zhən or /ˈfrɪziən/ FRIZ-ee-ən) are a closely related group of West Germanic languages, spoken by about 400,000 Frisian people, who live on the southern fringes of the North Sea in the Netherlands and Germany. The Frisian languages are the closest living language group to the Anglic languages; the two groups make up the Anglo-Frisian languages group and together with the Low German dialects these form the North Sea Germanic languages. Despite the close genetic relationship between English and Frisian, the modern languages are not mutually intelligible. Geographical and historical circumstances have caused the two languages to drift apart linguistically.

Frisian is traditionally divided into three branches often labeled distinct Frisian languages even though the dialects within each branch are not necessarily mutually intelligible. West Frisian is by far the most spoken of the three and is an official language in the Dutch province of Friesland, where it is spoken on the mainland and on two of the West Frisian Islands: Terschelling and Schiermonnikoog. It is also spoken in four villages in the Westerkwartier of the neighbouring province of Groningen. North Frisian, the second branch, is spoken in the northernmost German district of Nordfriesland in the state of Schleswig-Holstein, on the North Frisian mainland and on the North Frisian Islands of Sylt, Föhr, Amrum, and the Halligs. It is also spoken on the islands of Heligoland and Düne in the North Sea. The third Frisian branch, East Frisian, has only one remaining variant, Sater Frisian, spoken in the municipality of Saterland in the Lower Saxon district of Cloppenburg. Surrounded by bogs, the four Saterlandic villages lie just outside the borders of East Frisia, in the Oldenburg Münsterland region. In East Frisia proper, East Frisian Low Saxon is spoken today, which is not a Frisian language, but a variant of Low German/Low Saxon.

Cuxhaven (German: [kʊksˈhaːfn̩] ; Low German: Cuxhoben) is a port town and seat of the Cuxhaven district, in Lower Saxony, Germany. The town includes the northernmost point of Lower Saxony. The city serves as a gateway to the nearby Heligoland islands, a tax free zone off the coast of Germany. Cuxhaven is situated on the shore of the North Sea at the mouth of the Elbe River. Cuxhaven has a footprint of 14 kilometres (9 miles) (east–west) by 7 km (4 mi) (north–south). Its town quarters Duhnen, Döse and Sahlenburg are especially popular vacation spots on the North Sea and home to about 52,000 residents.

Cuxhaven is home to an important fisherman's wharf and ship registration point for Hamburg as well as the Kiel Canal until 2008. Tourism is also of great importance. The city and its precursor Ritzebüttel belonged to Hamburg from the 13th century until 1937. What remains of Ritzebüttel is Ritzebüttel Castle ('Schloss Ritzebüttel'). The island of Neuwerk, a Hamburg dependency, is located just northwest of Cuxhaven in the North Sea. The city's symbol, known as the Kugelbake, is a beacon once used as a lighthouse; the wooden landmark on the mouth of the Elbe marks the boundary between the river and the North Sea and also adorns the city's coat of arms.

Nordfriesland (German pronunciation: [nɔʁtˈfʁiːslant] ; Danish: Nordfrisland; North Frisian: Nordfraschlönj [nɔʀdˈfʀaʃlœɲ] Low German: Noordfreesland), also known as North Frisia, is the northernmost district of Germany, part of the state of Schleswig-Holstein. It includes almost all of traditional North Frisia (with the exception of the island of Heligoland), as well as adjacent parts of the Schleswig Geest to the east and Stapelholm to the south, and is bounded (from the east and clockwise) by the districts of Schleswig-Flensburg and Dithmarschen, the North Sea and the Danish county of South Jutland. The district is called Kreis Nordfriesland in German, Kreis Noordfreesland in Low German, Kris Nordfraschlönj in Mooring North Frisian, Kreis Nuurdfresklun in Fering North Frisian and Nordfrislands amt in Danish.

As of 2008, Nordfriesland was the most visited rural district in Germany.

The North Frisian Islands (German: Nordfriesische Inseln, pronounced [ˈnɔʁtˌfʁiːzɪʃə ˈɪnzl̩n]; Öömrang and Fering North Frisian: Nuurdfresk Eilunen; Söl'ring North Frisian: Nuurđfriisk Ailönen; Danish: Nordfrisiske Øer) are the Frisian Islands off the coast of North Frisia.

The term covers both the North Frisian Islands in the narrow sense (in Schleswig-Holstein, Germany) and the Danish Wadden Sea Islands (in Denmark). However, culturally and linguistically, the Danish islands are usually not reckoned as being part of North Frisia, since they are not inhabited by native speakers of the North Frisian language. Occasionally, the remote island of Heligoland is also included in this group for reasons of administrative convenience, despite not being located in the Wadden Sea, since the island is home to its own unique dialect of Frisian.

Düne (German pronunciation: [ˈdyːnə] ; Danish: Dynen; North Frisian: de Halem) is one of two islands in the German Bight that form the Archipelago of Heligoland, the other being Heligoland proper.

Heligolandic (Halunder) is the dialect of the North Frisian language spoken on the German island of Heligoland in the North Sea. It is spoken today by some 500 of the island's 1,650 inhabitants and is also taught in schools. Heligolandic is closely related to the insular North Frisian dialects of Fering and Öömrang because medieval fishery around Heligoland attracted Frisians from Föhr and Amrum, and close contacts have been maintained ever since. In fact Fering and Öömrang are closer in linguistic aspects to the dialect of Heligoland than to that of their neighbouring island Sylt, Söl'ring. Heligolandic also contains a variety of loanwords from 19th-century Modern English due to the 83-year British control of the island.

James Krüss is probably the most notable author of poems and narrations in Heligolandic while Maria Leitgeber (1906–1979) wrote the most substantial prose.