From the CE Strat Guide:
Aqueducts:
- Techs: Civic 14, Construction 24
- Inventions: Civic Planning, Arches & Domes
- Civ Value: 35
Forum:
- Techs: Construction 1
- Inventions: none
- Civ Value: none
Temple:
- Techs: Civic 1
- Inventions: Religous Organization
- Civ Value: None
Arena:
- Techs: Civic 18, Construction 22
- Inventions: Civic Planning, Arches & Domes, The Mob
- Civ Value: None
Academy:
- Techs: Construction 12
- Inventions: None
- Civ Value: 30
Foundry:
- Techs: Civic 14, Land 26
- Inventions: Civic Planning
- Civ Value: 35
Irrigation:
- Techs: Construction 1
- Inventions: None
- Civ Value: 5
Mine:
- Techs: Construction 5
- Inventions: None
- Civ Value: 15
Forestry:
- Techs: Construction 9
- Inventions: None
- Civ Value: 10
Roads:
- Techs: Civic 14, Construction 15
- Inventions: Civic Planning
- Civ Value: 40
Harbour:
- Techs: Naval 10, Civic 14
- Inventions: Civic Planning
- Civ Value: 35