Personally I didn't tried this, but in last game an AI chose this and spread his religion to me. Public School was 400. Looked quite good, unfortunately I didn't had enough faith though. I checked XML then, all 3 science building were set at 200 cost. Since you get x2 penalty on faith purchases in Industrial Era, Public School was 400. A Research lab would be 600 (x3 in modern). I think this is still weaker than For the Glory of God, since you can purchase GS and other GP. How do you think?