@ Hian
Must disagree. Pogan religion fought the mesves as "organized ones". Like Abncitent upper and lower egypt fought them selves to determine witch gods are true ones (like fighting in hotest day, under sun adn win means the god of Sun relly exists and grants its powers).
But to be true, some egyptians(priests actually) knew astronomy well. The priests, gathered man in middle of the night, and told them to pray to his god if they want to see the sun again. After the some prayers the priest says, that his god has listen to their prayes and granted them whith a new day (and this was the moment the sun started shining on the horizon).
So calling egyptian gods and religion "true" is false. Religion is thinking what unknow is like, not knowing it.
@ Psycadelic_Magi
Yes, a good idea, but Frog posted it firsts. Yet to spread your pogan religions to foreign civs ? Like they dont have their own pogan religion at build of city... + I cant recall any other civs exept Rome and Greece that shared same religion (ofcourse they changed names of some gods and their minions, maybe some rituals as well, but we cant be sure of it regarless what books tell). And Rome had same "religion", becouse Greeks had their big colony, "small greece", and its influances spread into tribes that founded Rome. So Rome actally was founded whith Greeks religion.
Well this all is just a simple version of what really is known.
Yet if were in religions its really stupid that we dont have a civ that founded Judaism !!!
We got India whith hinduism, Arabia whith Islam, Rome whith Cristianity (yes Jezus Christ was born in Betleyem, but faith was funded in Jeruzalem, but Holy City was moved to Rome), Persia whith Zoroastrialism, Chaina whith Buddizm and Taoism, and who is whith udaism? Barbarian city of Assyria ? lol
but coding and implating this "religions" suggestions in TR will take longer than posting suggestions here.
Stay safe and nuke some French for me - just decleared early war against my Spain, and i lost it on emperor x_x 2700bc .l (love this one eyed face

)