Advanced Extraction Techniques

Advance tree

1. New World
2. Colonial Charters
3. Exploration Fleets
4. Improved Trade Ships
5. Advanced Extraction Techniques
6. Patio Process
7. Dragon Tree Groves Only some countries
8. The Castagniccia Only some countries
9. Flourishing Cities Only some countries
10. Madaoua Settlements Only some countries
11. The Studium Mantovano Only some countries
12. Chichaoua Sugar Only some countries
13. Almoravid Dinar Mint Only some countries
14. The Marble Trade of Paros Only some countries
15. The Piassafòrt Only some countries
16. Pisan Marble Tradition Only some countries
17. Sicilian Silk Only some countries