Preservation of Knowledge

Game Database
Age of Empires IV
Technologies
Preservation of Knowledge

Research Technology Unique

Reduce the cost of all technology and Age advancements by -20%.

Stats

Age	Time	Cost
Feudal Age	30s	25 Wood 75 Gold

Available to

Abbasid Dynasty

Data from AoE4 World data (Open data; game data under Microsoft's Game Content Usage Rules), imported 2026-10-03.
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