Research costs (University of Architecture)
Researched at
- cradle of the sun (4055, -304)
- karnak (1804, -855)
- khartoum (-74, -6569)
- kush (464, -3536)
- lower egypt (1083, 6129)
- qatara (-257, 6461) (on timer)
- seven lakes (1490, 2030)
- sinai (2962, 4542)
- tanis (4207, 7105)
- upper egypt (1655, 3960)
Invention of Cement and Concrete
Ore Extraction appears to be a pre-requesite tech.
Level required to learn: =6 (I'm sure. I just got lvl 6 and learned it. --Shivani)