Common Improvements
Ziggurat
Description
Unlocks the Builder ability to construct a Ziggurat, unique to Sumeria.

+1 [ICON_SCIENCE] Science. +1 [ICON_FAITH] Faith and +1 [ICON_CULTURE] Culture if adjacent to River. +2 [ICON_GREATPROPHET] Great Prophet Points if adjacent to City Center. When you complete a special quest for each type of city-state for the first time, receives corresponding yields of the city-state`s type.

Cannot be built on Hills. Can be built on Floodplains. One per City; after respectively founding Pantheon and Religion, [ICON_CAPITAL] capital can build an additional Ziggurat; for every building of Holy Site district, city can build an additional Ziggurat.
Adacency Bonus
+1 [ICON_CULTURE] Culture for having an adjacent river tile.
+1 [ICON_FAITH] Faith for having an adjacent river tile.
ICON_IMPROVEMENT_ZIGGURAT
Traits
Unique To
+1 [ICON_SCIENCE] Science
plunder yields: 50 [ICON_GOLD] Gold
Requirements
Built By
Language