Win 10,000 florins playing Hazard.
This is pure luck. If want to do this, I suggest you should have lots of money, since you will be gambling here. So we don’t know when you will win.
To start off, you need to go the Theives Guild. It’s in the very bottom left corner of the Rome map, in Antico District.
Once you go inside, you will see a group of people gambling on the left. Talk to the guy and play the game. Maxing your bet and keep rolling until you win 10,000 florins
For a complete walkthrough of the game you can watch the video here.