Library/Rise of Kings

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Overview Chronicles tech tree Warbirth tech tree

The Library handles fundamental groundbreaking research, which then feeds into new technologies, buildings and of course new units. Generally, each new game begins with a Library already set up, so all that is required is to obtain resources required to buy the research the Library has to offer.

There are five paths of research in the Library: Science Science.jpg, Commerce Commerce.jpg, Civic Civic.jpg, and Military Military.jpg, as well as three trunk technologies. Each one of them is a prerequisite for further research, which in turn might contribute towards bettering your units and even the stylistic appearance of your faction's buildings!

Trunk technologies

Trunk technologies allow your faction to grow and mature as a civilisation, and are required to access Reforms and Research which enhance your faction vis-à-vis others. They replace the former Age or Epoch techs of other games.


RESEARCH LEVEL NAME GRANTS ACCESS TO COST

1
Dark Age

Dark Age

— an axe age, a sword age
— shields are riven —
a wind age, a wolf age —
before the world goes headlong...

—The Eddas
  • Basic tech level

None, basic.

2
Castle Age

Castle Age/Castellation

The best fortress which a prince can possess is the affection of his people.
—Niccolò Machiavelli

  • Low-level technologies and units
  • 500Book.png
  • 500Food.jpg

3
Imperial Era

Imperial Era/Urbanisation

"Ye are the light of the world. A city that is set on a hill cannot be hid."Matthew 5:14

  • Advanced tech level and units
  • 1,000Book.png
  • 1,000Food.jpg

Scientific research

Science research increases line of sight for many of your units (including buildings), makes new Resource technologies available so you can increase gather rate, permits construction of new types of buildings, and decreases the cost of all other technology research incrementally.

RESEARCH LEVEL NAME GRANTS ACCESS TO COST UNLOCKS

1
Classicism

Classicism

"A prudent man should always follow in the path trodden by great men and imitate those who are most excellent."

—Niccolò Machiavelli
  • Medium-level metallurgy research at Foundry
  • Medium-level knowledge upgrades for University.
  • Research cost cheaper and research speed improved by 10%
  • Increased LOS for Scout and Buildings
  • (Spain.jpg only) +56 resources instead of +20 from Ruins
  • Timber.jpg: 120
  • Wealth.jpg: 50


2
Natural Law

Natural Law

"The vicar of the Almighty." —Geoffrey Chaucer

  • Medium-level metallurgy research at Foundry
  • Medium-level knowledge upgrades for University.
  • Research cost cheaper and research speed improved by 10%
  • Increased LOS for Scout and Buildings
  • (Spain.jpg only) Gain +82 resources instead of +20 from Ruins
  • Wealth.jpg: 120
  • Book.png: 80
  • Paper Milling Woodworking
  • Crop Rotation Agronomics
  • Masonry
  • Herbology

3
Mathematisation

Mathematisation

"He who is ignorant of mathematics cannot know the other sciences nor the affairs of this world." —Roger Bacon

  • Transport of land units by sea
  • Temple.
  • Research cost cheaper and research speed improved by 10%
  • Increased LOS for Scout and Buildings
  • (Spain.jpg only) Gain +108 resources instead of +20 from Ruins
  • Wealth.jpg: 200
  • Book.png: 160
  • Land Law Agronomics
  • Procurement Logistics

4
Chemistry

Chemistry

"All substances are poisons; there is none which is not a poison." — —Paracelsus, 16th century Swiss surgeon and scientific philosopher

  • Research cost cheaper and research speed improved by 10%
  • Increased LOS for Scout and Buildings
  • (Spain.jpg only) Gain +134 resources instead of +20 from Ruins
  • Wealth.jpg: 300
  • Book.png: 300

5
Biology

Biology

"No form of Nature is inferior to Art; for the arts merely imitate natural forms." —Marcus Aurelius

  • Medium-level crops and lumber upgrades in Granary and Sawmill
  • Research cost cheaper and research speed improved by 10%
  • Increased LOS for Scout and Buildings
  • (Spain.jpg only) Gain +160 resources instead of +20 from Ruins
  • Wealth.jpg: 500
  • Book.png: 500

6
Optics

Optics

"Who looks out with my eyes? What is the soul? I cannot stop asking." —Rumi

  • Low-level knowledge upgrades for University
  • Granary
  • Sawmill.
  • Research cost cheaper and research speed improved by 10%
  • Increased LOS for Scout and Buildings
  • (Spain.jpg only) Gain +186 resources instead of +20 from Ruins
  • Wealth.jpg: 900
  • Book.png: 900
Engineering

7
Empiricism

Empiricism

"He who perceives, has knowledge thereby ." —Anselm of Cantebury, 12th century bishop

  • Foundry
  • Low-level crops and lumber upgrades in Granary and Sawmill.
  • Research cost cheaper and research speed improved by 10%
  • Increased LOS for Scout and Buildings
  • (Spain.jpg only) Gain +212 resources instead of +20 from Ruins
  • Wealth.jpg: 1,500
  • Book.png: 1,500

Commerce research Commerce.jpg

"He understands where, when, and how much to take in and pay out." — Leonardo Bruni

Commerce research will cost you Timber and Knowledge at the Library. When you complete Commerce research, your Commerce Limit Commerce Cap goes up for all Resources you gather: Food, Timber, Metal, and Wealth. You can gather more of them only up to the Commerce Cap; surpass the cap and any excess is simply lost to you. Commerce research along with Civics research is also required to gain access to a variety of military units as well.

RESEARCH LEVEL NAME GRANTS ACCESS TO COST UNLOCKS

1
Caravan Train

Caravan Train

"A journey of many miles begins with a single step." —Taoist saying

  • Market.pngDock
  • Increased Caravan limit Tradesman limit
  • Increased commerce cap for all resources.
  • 60Timber
  • 60Food

2
Cartography

Cartography


"[He] has made the earth your couch, and the heavens your canopy." —The Qur'an (2:22)

  • Trading resources at market
  • Increased Caravan limit Tradesman limit
  • Increased commerce cap for all resources.
  • Hache.png Woodowrking
  • Croprot.png Agronomics

3
Linguistics

Linguistics

"Stick to your own grammar, my lord, for it is much better." —Richard I Lionheart

  • Trade with allies and peaceful factions
  • Increased Caravan limit Tradesman limit
  • Increased commerce cap for all resources

4
Compass

Compass

"In losing me, you might yourselves be lost." —Dante Alighieri, Paradiso (Bk II)

  • Increased Caravan limit Tradesman limit
  • Increased commerce cap for all resources.

5
Guilds

Guilds

"Everyone has been made for some particular work, and the desire for that work has been put in every heart." —Rumi

  • Increased Caravan limit Tradesman limit
  • Increased commerce cap for all resources
Deforestation Timber production

6
Banking & Finance

Banking and Finance

"We are in need of money, and without money, nothing of what should be done, can be done." —Anna Comnena, Alexiad, Cap I

  • Increased Caravan limit Tradesman limit
  • Increased commerce cap for all resources

7
Mercantilism

Mercantilism

"Better to be cheated by the price than by the merchandise." —Baltasar Gracián, 17th century Spanish priest and author

  • Increased Caravan limit Tradesman limit
  • Increased commerce cap for all resources.

Civics research

"Believers, be steadfast and guard your borders."— The Qur'an

Civics research Civic.jpg allows you to build one new city with each completed round, and increases your national borders. If your borders abut other nations' borders, then you'll gain strength in the pushing match. If you don't touch territories yet, the diameter of space around your Cities simply expands. Civics research is also vital for...

RESEARCH LEVEL NAME GRANTS ACCESS TO COST UNLOCKS

1
Manorial System

Manorial System

"He made safe his castle that was upon a high hill, and he gathered in his flocks."

—Ferdowsi, Shahnameh
  • Increased City Limit city limit.
  • increased borders
  • low-level attrition research at tower.
120Food.jpg

2
Bureaucracy

Bureaucracy

"Kings are wont to create as many eyes, ears, arms and legs for themselves as they see fit."

—Aristotle, Politics
160Food.jpg

3
Law Enforcement

Law Enforcement

"A just city should favour justice and the just, hate tyranny and injustice, and give them both their just deserts." —al-Farabi

  • 160Book.png
  • 160Food.jpg

4
Jurisdiction

Jurisdiction

"They who do not mix their belief with injustice will have security, for they are rightly guided."

—The Qur'an (6:82)
  • Increased City Limit city limit.
  • increased borders
  • medium-level attrition research at Tower.
  • 300Book.png
  • 300Food.jpg

5
Political Theories

Political Theories

"I am a lover of liberty. I will not and I cannot serve a party." —Erasmus

  • 500Book.png
  • 500Food.jpg

6
Sovereignty

Sovereignty

"Be of one mind and one faith, that you may conquer your enemies and lead long and happy lives."

—Genghis Khan
  • 1,000Book.png
  • 800Food.jpg

7
Divine Right

Divine Right

"I am the King of Rome, and therefore am above grammar."

—Sigismund of Luxemburg, Holy Roman Emperor (r 1433-1437)
  • 1,500Book.png
  • 1,500Food.jpg

Military research

"Any man clad in armour and bascinet is as noble as any prince or king."

Completing Military research increases your file:population cap and also allows you to start upgrading your units at your military structures. Additionally, the cost of units and unit upgrades is lowered with each successive level researched.

RESEARCH LEVEL NAME GRANTS ACCESS TO COST UNLOCKS

1
Feudal Levy

Feudal Levy

"To win a boar’s head one must sacrifice the hounds."

—Wolfram von Eschenbach
  • Increased Population.jpg Population Cap
120Food.jpg
  • Peasants' Commune.png;
  • Tower

2
Mercenaries

Mercenaries

"...they spent well-nigh all that they had, both in the sojourn that they had made there and in the great payments that they had made for the fleet."

— Robert de Clery, On the Conquest of Constantinople, Ch 16
  • Increased Population.jpg Population Cap
  • -5% production cost for units of previous ages per level ahead
  • -10% upgrade cost for units of previous ages per level ahead
  • 100Food.jpg
  • 100Ore.png
  • Barracks.jpg;
  • Town Watch Guild.png

3
Heraldry.png

Heraldry and Code of Honour

"See that you come
Not to woo honour, but to wed it."

—William Shakespeare, All's Well that Ends Well (Act 2 scene i)
  • Increased Population.jpg Population Cap
  • -5% production cost for units of previous ages per level ahead
  • -10% upgrade cost for units of previous ages per level ahead
  • 200Ore.png
  • 160Book.png
  • Stable;
  • Assédio.jpg;
  • Fort

4
Standing Army

Standing Army

"Go now through all the tribes of Israel, from Dan even to Beersheba, and number ye the people, that I may know the number of the people."

—2 Samuel (24:2)
  • Stockade
  • Increased Population.jpg Population Cap
  • -5% production cost for units of previous ages per level ahead
  • -10% upgrade cost for units of previous ages per level ahead
  • 360Book.png
  • 250Ore.png

5
Cow.png

Conduct of War

"For not by numbers of men, nor by measure of body, but by valor of soul is war to be decided." —Belisarius, 7th century Byzantine general

  • Increased Population.jpg Population Cap
  • -5% production cost for units of previous ages per level ahead
  • -10% upgrade cost for units of previous ages per level ahead
  • 650Book.png
  • 400Ore.png
6
Linears.png
Linear Tactics

"Fighting men are the city's fortress." —Alcaeus of Mytilene, classical Greek poet

  • Increased Population.jpg Population Cap
  • -5% production cost for units of previous ages per level ahead
  • -10% upgrade cost for units of previous ages per level ahead
  • 1,300Book.png
  • 500Ore.png

7
Miliscience.png

Military Science

"Wars begin when you will, but they do not end when you please."

—Niccolò Machiavelli
  • Increased Population.jpg Population Cap
  • -5% production cost for units of previous ages per level ahead
  • -10% upgrade cost for units of previous ages per level ahead
  • 1,800Book.png
  • 1,200Ore.png