After 16 hours I've reached Venice. It's huge! I think it might be larger than Florence, Romagni, your villa town and the castle town all put together.

On the down side I'm not so impressed with the early Venice gameplay. Every single roof has a guard on it so I'm being yelled at constantly, and having to fight far too frequently. The streets are confusing mazes and right now large chunks of the city are blocked off with Barriers of Doom(TM) so the path which looks like it might get you headed in the right direction is no use, and I can't reach most of the view points so my map is absolutely useless. This has to be temporary, limitations put in place to encourage you to play through the introductory missions. Got to be. I can't understand why else they would make simple travel to be such a joyless pain in the behind in the largest area in the game.