Just wanted to post this other map of Lucerne, in case you are interested. It's from the 1790s. However, most structures are medieval. If you want to look at a higher resolution of this map and also the previous map that was posted on this thread, the city archive of Lucerne lists some old maps on their website. You can see them here:
https://staatsarchiv.lu.ch/schaufenster/karten_stadtansichten/stadtansicht_schumacher (Sorry, it is not available in English)
As you can see, the Hofbrücke, which is the one in the top right side of the map, is very close to the shore. This is to admit easy access for the people to the church on the other side but also because the bridge itself, together with the Kapellbrücke (the one with the tower) and the Spreuerbrücke (the one on the left) are part of the fortifications of the city. They block ships from getting to the shorelines and allow guards to patrol and potentially shoot at ships from the bridges like ramparts on a castle or a wall. While the Kapellbrücke is the oldest wooden bridge with a roof in Europe it was built later than the tower in the middle, which was used, among other things as a treasury, archive, prison and torture chamber.
The city walls are on top of a hill, which is on the city side quite steep in some parts.
Concerning the connections to Gulltown: As far as I'm aware there is no river in Gulltown or there is certainly none in the current version. Therefore, lots of bridges may not make a lot of sense. If there is a natural harbour that could create a shape where some parts of the town would need to be connected with others via bridge, this would defeat the benefits of having a natural harbour as a bridge like the ones in Lucerne would block any ship big enough to transport goods. So if you intend to use them as inspiration, I think the bridge as a rampart concept might be quite fun. Since Gulltown seems to be well-protected on its rear due to the mountains, they could instead focus their efforts to fortifying their city toward the sea. Not sure how this works best with having a big harbour as well but I guess that's for you to figure out.
Also, random aside, one of the towers of the walls (the fifth one, called Zytturm, built in 1440) has a big clock on it. Not sure what the stance on clocks is on the server because I haven't seen any yet, I think, but maybe having a tower with a clock could be a defining feature.
PS: Sorry to barge in on the server with these long posts lol.