"Norderport" is the "north gate" in the city wall surrounding the old parts of the Hanseatic town of Visby. Visby is on UNESCO's list of World Heritage Centers. Only a few decades ago "everything" in Visby was located within the city wall and there was lots of traffic passing throug this way.
Visby was a member of the medieval German trade association the Hansa and is now a popular place for tourists. Visby is on the UNESCO list of world heritage centers since 1995.