Value: Iron Age
Confidence: Canon
Advanced metalworking, engineering, road networks.
Value: 0.46
Min: 0.4
Max: 0.5
Confidence: CalculatedGuess
Pottery (ovens), but no other energy consuming industry. Manual labor (not changing per capita consumption), some animal labor, few wind and water mills. Still 200 W for most people. Total might be 250 W.
Value: 100e6
Min: 70e6
Max: 200e6
Confidence: Canon
References:
Quick Wikipedia research. Error bars guestimated.
Value: 3
Confidence: Canon
TL 3 Metal. Iron working, engineering, road networks. Hardest tech: iron smelting at ~1500 C, Roman concrete, aqueducts. Same TL as Bronze Age, since iron is harder to smelt but same fundamental metalworking principle.
Value: 3
Confidence: Canon
Han China, Roman Empire, advanced iron working, engineering, road networks. Class 3 Bronze/Iron.
Many towns and cities in populated parts of the world but still hunter gatherers. Basically Han China and the Romans plus many regional Bronze Age powers.