繁荣

Prosperity 是一种机制，允许那些长期未被围攻、掠夺或疾病蹂躏的省份获得某些加成，如额外的税收收入和更快的征兵补充。独立公爵或更高等级的公爵可以设定其中一个 demesne 将省份作为其年度新增和活动的重点。反过来，省份内长期的疾病或围城会导致 Depopulation，从而降低税收并加快征税补充速度。繁荣（以及人口减少）需要 The Reaper's Due DLC.

Levels of Prosperity

		Local tax modifier	Levy reinforce rate	Local revolt risk	Supply limit	Local build cost modifier	Local build time modifier	Disease resistance
	Prospering	0.1	0.2	-0.01				-0.1
	Flourishing	0.2	0.4	-0.015	1	-0.025	-0.025	-0.15
	Booming	0.3	0.6	-0.02	2	-0.05	-0.05	-0.20

Crown Focus

统治者可以将一个省份设为他们的王冠焦点，前提是：

• Duke tier or higher
• Not nomadic
• Any of:
  • Independent
  • Vassal duke with 35 realm size
  • Vassal king with 55 realm size
  • Vassal with republic, merchant republic, or holy order government

王冠重点省份每年在其隐藏繁荣值上获得小幅加成，只要该省份没有被占领或正经历疫情 disease.

Effects of high prosperity & crown focus

已经拥有高繁荣水平的王冠重点省份有资格举办特殊事件。这类活动更频繁，需要高管理能力和学习技能。

• 在繁荣等级2时，拥有不同文化的省份可以以你年收入的100%成本转换。它还会皈依该省的宗教，并取消 nomad agitation modifier, if relevant.
• At prosperity level 3, a new settlement slot can be created for 250% of yearly income.
• 在繁荣等级3时，可以为省份添加各种正面修正：

	Bonus	Requirements
Jewish Settlement	+25% city tax	Christian, Zoroastrian or Muslim; no "Expelled the Jews" modifier; no "Minority Settlement" modifier (in the province)
Minority Settlement	+25% city tax	not Christian, Zoroastrian or Muslim; no "Jewish Settlement" modifier (in the province)
Glorious Monument	+0.5 Prestige
Merchant Harbor	+50% galleys	province is coastal
Scholar Foundation	+0.03 military tech points +0.03 cultural tech points +0.03 economic tech points
Great Library	+25% technology spread rate
Center of worship	+0.25 Piety +25% temple tax
Logging Company	-15% build cost -15% build time	province terrain is forest or jungle
Ore Mine	+10% tax -10% build cost	province terrain is mountain
Regimental Ground	+15% levy

注意“犹太定居点”和“少数族裔定居点”修正词基本上是一样的。它们被分为两个不同的修正值，纯粹是为了历史和角色扮演的目的。

Increasing prosperity

每个省份都有一个隐藏的繁荣值，可以小幅递增。当达到100/250/500时，繁荣等级提升。

每个省份每年都有机会获得积分。随着主人的管理能力、主人繁荣血统、成年仪式中的“繁荣标志”、大雨、概率增加， great works, or a local trade post.随着战争（尤其是主要攻击方）、各省的负面影响，或者 tribal 政府。这种被动增长的幅度取决于 terrain如果沿海省份有城市，则会获得加成。

The ambition to "See the Realm Prosper":

• Enables some flavor events that increase prosperity
• 如果和平持续5年，雄心成功，并在整个领地（不仅仅是直辖区）中每个符合条件的省份增加35点。

Councilors can increase prosperity:

• Certain job actions add 6 points when successful:
  • Marshal: train troops
  • Steward: oversee construction
  • Spymaster: study technology
  • Spiritual: advance cultural technology
• Passive Job flavour events for council members:
  • Any councilor with 12+ skill and Smart can trigger a "good at job" event
  • 拥有15+技能的执法官或管家可以提供提升资本的价值

Many peacetime decisions increase prosperity:

• Most feasts and festivals add 8 points
• A completed tournament adds 15 points
• Ancestor Worship can increase prosperity if you wish for economic assistance
• 对于防御性的异教徒来说，拥有某些守护神可能会增加繁荣

Other events:

• A fleet returning with loot 在你的首都增加12点。限制每5年一次（除非你变更资本）。
• Several events from Way of Life, with the Business focus
• 有随机机会进行慈善，如果你有一个拥有 Hospital
• 投资省级药剂师的随机机会，如果你有 Court Physician
• When a Master Engineer improves your demesne province, prosperity also increases.

Loss of prosperity

疾病、掠夺和围城会抹去通往下一繁荣等级的进度，有时甚至会掉落整整一关。占领领地通常会将省份繁荣度重置为0。