Liubice

Liubice, also known by the German name Alt-Lübeck ("Old Lübeck"), was a medieval West Slavic settlement near the site of modern Lübeck, Germany. Liubice was located at the confluence of the Schwartau with the Trave across from Teerhof Island, approximately four kilometres north of Lübeck's island old town. The residence of Henry, the Christian prince of the Obotrites, Liubice was destroyed after his death by the pagan Rani of Rugia.

Slavic tribes began migrating to the Bay of Lübeck in the 7th century, replacing migrating Germanic tribes. The Wagrians and Polabians established numerous villages and castles, including Starigard, Plune, Racisburg, and Liubice, whose name means "lovely".

Liubice was sparsely populated during the 9th and 10th centuries. In the middle of the 11th century, the settlement began to develop. Starting in 1055 during the rule of Gottschalk, a Christian prince of the Obotrite confederacy, the old castle was rebuilt. Gottschalk was killed during an uprising in 1066 and replaced as Obotrite prince by the pagan Kruto. Liubice's castle was modified for the second time in 1087, near the end of Kruto's reign. Because the fortifications were located on a peninsula between the Schwartau and Trave Rivers, a twelve metre wide trench was created to separate Liubice from the mainland, essentially creating an island fortress.

...
Wikipedia