The city is a large port city. There are several distinct districts in it.
First is the Port District. It consists largely of three parts. There's the foreign docks, which are restricted access to locals, in an attempt to limit smuggling and properly apply taxes to imports and exports. It works to some degree, but not perfectly, like everything.
Then there's the local docks, which are where domestic trading vessels and fishermen dock from. It's much more loose, and the area is somewhat under the control of the Tongs, a criminal underclass.
Thirdly, are the Dockyards, where new ships are manufactured for sale, and is the military port, where they work on warships and dock elements of local fleets. There are also barracks here for serving marines and sailors when they are on alert.
The next district is the Foreign Quarter, where there are many domestic high-end merchants in exotic goods for export, as well as represenatives of foreign powers, be they governments or trade groups. If you need to find something that is truly exotic, this is where you look for it. The diplomat you work for has his house here.
After that is the Merchant Quarter. This is where the major land caravan routes meet the river docks, and where most of the more mundane and local goods are sold. There are many shops of many types, along with most of the professional tradesmen. Most everyone who lives in the city comes here, as well as most of the people from the other cities in the Empire. The main station of the City Watch is also in this district.
Then there is the Government Quarter. In it is the governor's 'mansion', a palace in all but name. There are numerous law offices as well as the courthouse. There is also a school for training civil servants here, which are the people who fill most of the offices of the government.
Lastly is the Magic Quarter, where there is the University, which trains augurs, nature mages, ritual mages, and spirit-shamens, for fairly steep prices. There are also merchants here which deal with magical objects as well as factors who contract for exotic raw materials used in their work.
Every quarter has, in addition to what was listed above, numerous housing districts, and many services. All quarters have drinking-houses, tea-rooms, salons, boarding-houses, brothels, inns, barbers, as well as many basic shops.