The Schlei (; da, Slien, also ''Slesvig Fjord''e.g. in: Adolph Frederik Bergsøe: ''Den danske stats statistik'', Kjøbenhavn 1844, p. 156) (more often referred to in English as the Sly Firth) is a narrow

inlet An inlet is a (usually long and narrow) indentation of a shoreline, such as a small arm, bay, sound, fjord, lagoon or marsh, that leads to an enclosed larger body of water such as a lake, estuary, gulf or marginal sea. Overview In marine ...

of the

Baltic Sea The Baltic Sea is an arm of the Atlantic Ocean that is enclosed by Denmark, Estonia, Finland, Germany, Latvia, Lithuania, Poland, Russia, Sweden and the North and Central European Plain. The sea stretches from 53°N to 66°N latitude and from ...

Schleswig-Holstein Schleswig-Holstein (; da, Slesvig-Holsten; nds, Sleswig-Holsteen; frr, Slaswik-Holstiinj) is the northernmost of the 16 states of Germany, comprising most of the historical duchy of Holstein and the southern part of the former Duchy of Sc ...

in northern

Germany Germany,, officially the Federal Republic of Germany, is a country in Central Europe. It is the second most populous country in Europe after Russia, and the most populous member state of the European Union. Germany is situated betwee ...

. It stretches for approximately 20 miles (32 kilometers) from the Baltic near Kappeln and Arnis to the

city of Schleswig Schleswig (, , ; da, Slesvig; South Jutlandic: ''Sljasvig''; nds, Sleswig; archaic English: ''Sleswick'') is a town in the northeastern part of Schleswig-Holstein, Germany. It is the capital of the '' Kreis'' (district) Schleswig-Flensburg. It ...

. Along the Schlei are many small bays and swamps. It separates the Angeln peninsula to the north from the Schwansen peninsula to the south. The important

Viking Vikings ; non, víkingr is the modern name given to seafaring people originally from Scandinavia (present-day Denmark, Norway and Sweden), who from the late 8th to the late 11th centuries raided, pirated, traded and se ...

settlement of

Hedeby Hedeby (, Old Norse ''Heiðabýr'', German ''Haithabu'') was an important Danish Viking Age (8th to the 11th centuries) trading settlement near the southern end of the Jutland Peninsula, now in the Schleswig-Flensburg district of Schleswig-Holst ...

was located at the head of the

firth Firth is a word in the English and Scots languages used to denote various coastal waters in the United Kingdom, predominantly within Scotland. In the Northern Isles, it more usually refers to a smaller inlet. It is linguistically cognate to ''f ...

(

fjord In physical geography, a fjord or fiord () is a long, narrow inlet with steep sides or cliffs, created by a glacier. Fjords exist on the coasts of Alaska, Antarctica, British Columbia, Chile, Denmark, Germany, Greenland, the Faroe Islands, Icel ...

), but was later abandoned in favor of the city of Schleswig. A museum has been built on the site, telling the story of the abandoned town.

Notes

Förden of Germany Bays of Schleswig-Holstein {{SchleswigHolstein-geo-stub