I thought it would be neat to provide a specialized placeholder at the center of villages where the occupants can erect a statue. So far I've come up with three ideas all based on the similarities of each tribe's pantheon that could give slight bonuses with each level.
Main Building Level 5
Only 1 per village or city.
Cannot be changed once selected
Can be a different statue in each village
Can be targeted by Cats
Each level provides 0.1% Bonus to it's specific niche. Maximum level 10.
Sample Level Build Cost:
Level 1 - 1,000 Wood | 2,500 Clay | 750 Iron | 500 Wheat
Each tribe would have the following variants based on their actual religion.
God/Goddess of War - Gives Bonus to Troop Offense/Defense
God/Goddess of Fertility - Gives Bonus to Population
God/Goddess of Commerce - Gives Bonus to Resources
I am sure there might be more possibilities.