Grand Ages: Medieval

When in a town you can see how much prosperity that town has and if it goes up or down. 100 is max, to gain prosperity make sure there is work, enough but not too much, there is good and trade. Churches can help you boost your prosperity by holding festivals, see the Party Hero trophy for more info. Armies do not boost your prosperity what so ever as they take your gold and food. try to keep them away from the city your trying to get this trophy with. I got this trophy during the campaign, don't worry about it too much it will come.