Classical Era
Medieval Era
Renaissance Era
Industrial Era
Modern Era
Atomic Era
Information Era
Future Era
Writing
Traits
Era
Ancient Era
Science Cost
50 [ICON_SCIENCE] Science
Eureka
Build a Monument.
Unlocks
Campus
Library
Sishu
Etemenanki
Private Education
Seowon
ICON_DISTRICT_OBSERVATORY
Observatory
Royal Archive
Literary School
Tech Tree
Prerequires
Pottery
Leads To
ICON_TECH_CALENDAR_HD
Calendar
Currency
Language