Market -> Bazaar -> Emporium
Stall -> Butcher -> Grocer
Library -> Municipal Library -> State Library
Bank -> Depository -> Exchequer
Harbor -> Pier -> Port
Colosseum -> Stadium -> Venue
College -> University -> Academic Campus
Observatory -> Satellite Array
Odeon -> Theater -> Performing Arts Center
Walls -> Buffer Zone
City Guard -> National Guard Base
Monastery -> Seminary School
Fletcher -> Musket Manufacture -> Rifle Factory
Monument -> Relic
Stable -> Horse Ranch
Jail -> Penitentiary -> Prison
TNT Factory -> Explosives Factory -> Missile Factory
Granary -> Storehouse -> Warehouse
Courthouse -> Law Center -> Administrative Complex
Stall -> Butcher -> Grocer
Library -> Municipal Library -> State Library
Bank -> Depository -> Exchequer
Harbor -> Pier -> Port
Colosseum -> Stadium -> Venue
College -> University -> Academic Campus
Observatory -> Satellite Array
Odeon -> Theater -> Performing Arts Center
Walls -> Buffer Zone
City Guard -> National Guard Base
Monastery -> Seminary School
Fletcher -> Musket Manufacture -> Rifle Factory
Monument -> Relic
Stable -> Horse Ranch
Jail -> Penitentiary -> Prison
TNT Factory -> Explosives Factory -> Missile Factory
Granary -> Storehouse -> Warehouse
Courthouse -> Law Center -> Administrative Complex

. Not bad. But you never know if this unit is as good as the rumours (I also got peltasts instead of archers
, what a pain in the a**). So I start looking the Visapedia. Visapedia states hwacha replaces catapult and requires STEEL
? Strange but looking at the stats it says THIRTEEN instead of FOUR. Not bad.
But then I start looking around. Who else has construction. I know the ai has the city guard build quite often. So how many Hwachas will I come across. I'm still fighting with axes.
. But twenty turns later I`m about to conquer the Arabian Holy city of Hinduism, they start rushing a hwacha right before my eyes. 
