Instructions
Go to the marketplace and upgrade 20 of your retailers to the rich level by investing gold in them.
Attract 70 settlers to your settlement. Do this by increasing food production and building entertainment venues such as taverns and baths.
Upgrade your settlement's three main buildings, the Storage, the Cathedral, and the Castle, to level three. Move your knight over to the building to cause the upgrade button to appear. If you have enough money, you may upgrade them.
Move your knight to the marketplace, then click the Proclamation button that appears next to the minimap. This will move your knight past levels 3/4 and move them on to level 5.