Religion

Each city and character will follow their own Religion. When enough characters in a Family convert to the Nation's religion the Nation will receive additional benefits. There are two types of religions in Old World: Pagan Religions and World Religions.

Pagan Religions are unique to each Nation and founded once the Nation completes its first Shrine improvement. Pagan Religions cannot spread, do not have Disciples and Theologies and can only be adopted as State Religion with the Divine Rule law.
World Religions can be founded once certain requirements are met. Pagan Religions can spread, have Disciples and Theologies and can always be adopted as State Religions. When a World Religion is founded, it founder will receive the option to gain 50 Civics, make a donation and gain 40 Opinion with the Religion for 40 years, or gain 2 Legitimacy and lose 40 Opinion with the Religion for 40 years.

World Religion	Founding Requirements	Disciple Appearance	Monastery Appearance	Temple Appearance	Cathedral Appearance	Holy Site Appearance
Zoroastrianism	2 Acolyte specialists
Judaism	Labor Force technology 2 Rancher specialists
Christianity	Metaphysics technology 2 Cities in the world that follow Judaism 1 Owned City that follows Judaism 12 Citizens
Manichaeism	Monasticism technology 2 Cities in the world that follow Christianity 2 Cities in the world that follow Zoroastrianism

Cities that follow a Religion will gain a yield bonus of 2 Culture. If the Opinion of its Religion of the Nation is Pleased or Friendly the city will gain Happiness. However if the Opinion of its Religion of the Nation is Upset, Angry, or Furious, the city will gain Discontent. The city where a Religion is first founded will be its Holy City and gain a yield bonus of 2 Civics.

State Religion

A Nation may adopt a Religion as its State Religion at the cost of 400 Civics. Adopting a Religion as State Religion has the following effects:

All cities that follow the Religion gain 1 Happiness each year
All cities that follow the Religion lose 1 Civics each year
If the Nation Leader doesn't follow the State Religion they will gain the choice to convert or lose 40 Opinion with the Religion for 40 years
Disciples can establish Theologies

Theology

Theologies can only be created by Nations that have a World Religion as their State Religion and require the use of a Disciple. Theologies will grant a bonus to all Nations that have the Religion as its State Religion and increases the chance for the Religion to spread by 5%. Each World Religion may have up to 3 Theologies.