UPDATE:
I build a new city around these towers. Download it here:
www.planetminecraft.com/project/salthaven-20---city-on-the-water/

The marinal town of Salthaven started with the idea of creating these sloppy, medieval towers, with a very steampunky feeling. I expended the area with a block of houses to the sides of the towers. The block consists of 2 layers. The wealthier citizens live on top and the poor in the small allies beneath them, at the water level.

I have divided the towers into appartements, added walkways and stairs to each front door. Recently I made the entire area more inhabitable, with market stalls, sea weed and salt farms, buckets hanging over the sea, places for ships to dock, etc. The main thing left to do is add interiors to all the houses and appartements in the towers.
The large ship on the side was made Raitis34

Additional Notes

I didn't realise how poor the video recording quality was until the video was completed and rendered. I'll try to remake it soon.

Texture pack used: Conquest