The city hall has it's own dedicated pier, alighting from a ship/baot and this is the view. It's clearly intended to impress with it's granduer. sadly the front entrance was being refurbished so some of teh splendour is lost.
This is one of only 3 entries into the castle that overlooks Olso Harbour. The grounds are freely accesible to the public. The castrle itself holds the Norwegian Ministry of defence and has a full garrison.