Since this early mention spoke of Nienburg (= new castle), some kind sort of fortress must already have existed there for some time, perhaps in order to protect the crossing of the Weser.
Kuna see varane mainimine rääkis Nienburgist (= uus linnus), pidi mingit liiki kindlus juba mõnda aega olemas olema, võib-olla selleks, et kaitsta Weseri ületuskohta.