Civilization Wiki is a FANDOM Games Community. I wanted a lot of the same flavor there, but chose to ultimately trade in their ability to swallow up CS to swallow up disloyal cities.
It was difficult to build a Venice knowing there is no Diplomatic Victory in Civ 6. You go from city-expanding empires to a Venice, a singular city state, focused on absurdly powerful maritime trade, who slowly can convert city-states to their empire as the game proceeds. If you have a related Youtube channel, enter the URL. Taking over a city without walls or encampments is basically the same as it used to be throw your units against it for a while until it falls. Personally with Venice I recommend focusing on sailing and optics early, then techs that give you wonders that make extra trade routes and boost trade route gold output. Climate change and sea level rise pose a serious threat to the city, as its formerly advantageous position on a marshy island in a salt-water lagoon has turned into its most dangerous feature: for instance, in 2019, a full 80 percent of the city flooded.