The remains of the fortress can be visited
Fortress Magdeburg-Bastion Cleve
The Cleve Bastion in Magdeburg represents the southeastern end of the Magdeburg Fortress. It is a monument to Prussian military architecture and city history, with origins dating back to the Middle Ages. Today, the excavated remains of the bastion are an accessible monument.
History+
Magdeburg's first fortifications date back to the 13th century. Between 1450 and 1550, these were extensively expanded due to the development of firearms, including new walls, moats, and the fortification of the Elbe front. This complex withstood sieges in 1550/51 and 1629. During the Thirty Years' War, the fortifications were expanded under Swedish command, but neglect of the southern front led to the city's capture and the demolition of the structures in 1631.
Source: Wikipedia · Licence: CC BY-SA 4.0 · Image: http://commons.wikimedia.org/wiki/File:Bastion_cleve_magdeburg.JPG
This description draws on the facts documented in the linked Wikipedia article; Wikipedia content is licensed under CC BY-SA 4.0. Wording and editing: Mobile History.
Location: 52.1234, 11.6352