This is the 12709th most frequent German word.
wilhelmsburg
"Wilhelmsburg" is a proper noun that refers to a district in Hamburg, Germany.
In this sentence, 'Wilhelmsburg' is used as a proper noun referencing a specific location.
Wilhelmsburg ist ein Stadtteil von Hamburg.
Wilhelmsburg is a district of Hamburg.
Here, 'Wilhelmsburg' is used again as a proper noun indicating the destination of an activity.
Wir haben Wilhelmsburg letzten Sommer besucht.
We visited Wilhelmsburg last summer.
In this example, 'Wilhelmsburg' is being discussed in terms of its historical aspect, still used as the name of the place.