Architecture (Age of Empires II)

Architecture is a Technology that is researched at the University in the Imperial Age. Having the the same effects and an upgrade from Masonry, this technology increases the Hit Points for all buildings by 10%; and increases their armor by +3. Combined with Masonry, buildings will have a total HP increase of 20% and +6 armor.

The Byzantines have building hit point bonuses that increases with each age, negating the fact they cannot research either Masonry or Architecture.