Buildings

Build cost: 100 material

Mine

 * Produce: Material
 * Defense: Normal
 * Influence: Normal

Stable

 * Produce: Knights
 * Defense: Normal
 * Influence: Normal

Library

 * Produce: Knowledge
 * Defense: Normal
 * Influence: Normal

Vassal

 * Produce: Nothing
 * Defense: Low
 * Influence: High

Fortification

 * Produce: Nothing
 * Defense: High
 * Influence: Low

Castle

 * Produce: Material, all the time
 * Defense: Extremely high
 * Influence: High