Architectural Engineering

Advance tree

1. Sanitation
2. Architectural Engineering
3. Closed Fields then 10 more
4. Jesuit's Bark then 2 more
5. A Trading Hub Only some countries
6. Via dels Passos Only some countries
7. Modernized Economy Only some countries
8. Hindu Architecture Only some countries then 1 more
9. Curtail Peasant Liberties Only some countries
10. Indústria Lapidària Only some countries
11. Ruthenian Villages Only some countries
12. Masters of Clockwork Only some countries
13. Tulip Period Only some countries
14. Woodblock Printing Only some countries