8 лют. 2021, 07:2408.02.21
We have no "Senate" in Pirates, but this sounds like "Captain's Quarters".
You don't have to upgrade any building, but a very specific one, most likely Manufactory (the one where you combine gold and lumber into gears).
To see what you need, simply click on "Upgrade":
The game will than show you what you're missing:
Even if you're not playing "Pirates", it should be the same in other Plarium games.