This is yet another (probably the last) patch to differentiate civilization from Athens.
Discussed in the forum https://wildfiregames.com/forum/topic/36934-civ-differentiation-athens/
In addition to bonuses, auras, etc ... we want to give Athens something peculiar of this culturally rich civilization. @chrstgtr raised a discussion in which I would like to see something involving Athenian democracy, which was a historic milestone for the world.
As democracy was born in athens the idea is:
1 - can train heroes earlier than other civilizations, in town phase.
2 - prytaneion moved to phase 1
3 - phase up (town) tech requires the construction of a prytaneion instead of 5 village buildings.
4 - phase up (town) tech is free cost and research time.