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封臣

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The realm tree of the small Catholic Kingdom of Navarra in 1066.

Feudal System Under the Feudalism system depicted in Base icon CK2.png Crusader Kings II, rulers grant parts of their personal property (their demesne) to vassals in exchange for a cut of their taxes and levies. A vassal's direct ruler is called their liege. In Crusader Kings II, every vassal can only have 1 liege.

The feudal system is a type of decentralization which makes ruling easier at the expense of personal power. Vassals can in turn distribute lands to vassals of their own, which is called subinfeudation. In return for their vassals' loyalty, the liege provides protection from external hostile forces.

In Base icon CK2.png CKII, a vassal meeting their duties depends largely on their opinion towards their liege. The lower it is, the fewer taxes and levies a vassal will provide. If relations deteriorate enough, the vassal might plot against their liege or join a faction to work with others in order to undermine or depose their liege.

Note that when a vassal inherits a title from outside his liege's realm which is higher ranked than his current one(s), the higher ranked title becomes his new primary title; this means that he'll cease to be a vassal of his (now former) liege. This is not the case if the liege grants the vassal the higher ranked title or if the vassal obtains the title via conquest, unless the title is of the same rank as the liege's primary title.

等级

Tiers of Titles 头衔有五个等级。一名领主只能成为一名更高级别领主的附庸。从最低至最高等级头衔各自的肖像与纹章边框如下图所示:

人物头衔 领地等级 描述
Baron Feudal.png 男爵 Barony.png 男爵领 A baron/baroness owns a holding (also called a Barony), the smallest land unit in the game. Holdings can be castles, cities, temples, tribes or nomadic capitals.

Barons (other than Patricians) are not playable, and their simulation is simplified to improve game performance. They cannot appoint councillors and cannot create factions. The Baron portrait is identified by a bronze ring, curled by a coloured ribbon. (Colour depends on government type)

Count Feudal.png 伯爵 County.png 伯爵领 A count/countess governs a province (also called a County), which is the smallest land area visible on the map.

A count always owns the capital holding of a province (usually a castle). They are also the de jure ("rightful"), and usually the de facto ("in fact"), liege of other barons within the same province. A character must at least be a count before they can be granted higher-tier titles. The count portrait is identified by a silver ring, curled by a coloured ribbon.

Duke Feudal.png 公爵 Duchy.png 公国 A duke/duchess manages a Duchy. Dukes (and above) start generating passive technology points.

Vassals have to be at least dukes in order to benefit from the bonus to levies at their capital county (+15%). A duke who owns more than one duchy is called a grand duke, which grants a +1 bonus to their demesne limit. The duke portrait is identified by a jeweled silver ring, curled by a coloured ribbon.

King Feudal.png 国王 Kingdom.png 王国 A king/queen controls a Kingdom. Kings and emperors may define realm laws in their demesne.

It is required to control a minimum of 2 duchies to create a de jure kingdom. The king portrait is identified by a golden ring, curled by a coloured ribbon.

Emperor Feudal.png 皇帝 Empire.png 帝国 An emperor/empress rules over an Empire and may vassalize kings (usually through force).

Proper administration of a large empire tends to become a complex task due to the micromanagement required. The emperor portrait is identified by a jeweled golden ring, curled by a coloured ribbon.

直属封臣上限

Vassal Limit Every ruler of the rank of duke and above should recognise that they cannot have too many direct vassals (of at least the rank of count; barons are not counted towards that limit). Having too many direct vassals will incur various penalties (mainly to liege taxes and levies), and some vassals may become independent upon succession.

The limit encourages rulers to consolidate their vassals if their realms are large. Empires that expand beyond their de jure territory are likely to require vassal kings. Tribal vassals don't count towards their non-tribal liege's vassal limit. However, AI vassals will adopt feudalism quickly if they share their liege's religion and culture. Horse Lords.pngNomadic vassals do not count towards their liege's vassal limit.

The direct vassal limit is affected by:

  • Base number (1) x ruler rank bonus (if the DLC icon Conclave.png Conclave Expansion is active):
    • Duke = base x 8.0; (10 without Conclave)
    • King = base x 15.0; (20 without Conclave)
    • Emperor = base x 20.0. (30 without Conclave)
  • +3 bonus for being a great duke (dukes owning two or more duchy titles and not owning a kingdom-tier title)
  • + Ruler diplomacy bonus = 30% of (ruler's Diplomacy\link= diplomacy + 1/2 of spouse's diplomacy)
  • Laws:
    • +2 for each council law in favor of the council beyond the first one - called "Council Power" (requires the DLC icon Conclave.png Conclave DLC); (max +14 for feudal realms, +12 for other government types).
    • From +10 to -10 for each level of Centralization law, in exchange for +0 to +4 demesne limit; Horse Lords.pngnomads do not have this law;
    • +25 for "Imperial Administration" law. However, as "Imperial Administration" automatically enacts duchy viceroyalties, the net vassal limit increase is +15;
    • -5 for each level of Viceroyalty law (requires the DLC icon Charlemagne.png Charlemagne DLC).
  • +10 for having Jade Dragon.png Chinese Imperial government
  • -10 for having tribal or nomadic government
  • +20 for having Princely elective succession (exclusive to the HRE)

税收

主条目:Economy

Taxes If non-nomadic vassals have a positive relation with their liege, they will pay taxes, but the amount of income they provide is mainly dependent on two factors:

  1. The income from holdings they own (which can be boosted by constructing buildings)
  2. Their liege's tax laws which determine the percentage of income vassals have to pay. This law can be set differently for the nobility, clergy and burghers.

If DLC icon Conclave.png Conclave DLC is enabled, the ruler may shift the focus of vassal obligations (under realm laws tab), trading off levies for taxes, instead of opinion for more income. The resulting opinion penalties (or bonuses) for changing tax law is temporary.

Otherwise, if DLC icon Conclave.png Conclave is disabled, the liege is allowed to set tax laws (under demesne law tab) in exchange for permanent bad opinion - i.e., the higher you tax, the lower your vassals' opinion of you. Therefore, a balance must be struck between the two.

Horse Lords.png Nomads do not pay taxes to their liege. Similarly, tribal vassals do not pay taxes to their tribal liege, unless their tribal liege is a vassal of a ruler following a non-tribal government.

征召兵

主条目:Levies

Levies Non-nomadic and some tribal vassals (without Conclave) have a legal obligation to provide a minimum number of troops to their liege based on the laws of the land and their own manpower.

If DLC icon Conclave.png Conclave is enabled, both minimum and maximum numbers of levies provided by vassals are set by realm laws. So, the ruler may shift the focus of vassal obligations, trading off taxes for increased levies - set separately for nobles, clerics and burghers.

Nobles prefer paying more taxes to sending troops, meanwhile burghers would prefer to provide more soldiers. Unfortunately, the liege tends to desire the opposite. The resulting opinion penalties (or bonuses) for changing tax law is temporary.

If DLC icon Conclave.png is disabled, vassals may provide troops depending on:

  1. Minimum numbers are set by crown laws
  2. The liege's levy laws which establish maximum numbers of troops (under demesne laws tab)
  3. Their opinion towards their liege.

Whichever of crown laws minimum or levy laws maximum is higher, it will determine the number of levies provided. Because relations determine both levy size and a vassal's chance of rebellion, an unpopular liege is in a lot of danger. They risk a situation whereby part of their realm rebels, while the rest of it provides very few troops to counter the rebellion.

Nomadic vassals do not provide levies to their liege. Instead, they are called into wars as allies. Tribal vassals do not provide levies to tribal lieges under certain conditions; tribal rulers call their tribal vassals into wars as allies, if they do not have Medium Tribal Organization (or above) and DLC icon Conclave.png is not activated. With DLC icon Conclave.png, independent tribal rulers always call their tribal vassals into wars as allies.

叛乱

主条目:Factions

Rebellion Vassals will not always like their liege. As described above, this hurts the liege both economically and militarily, but there's one final aspect to the vassal-liege relationship: the vassal attempting to overthrow their liege.

If a vassal is pushed too far, or they're simply too ambitious, they will rise in rebellion against the liege, and forcefully attempt to gain what they want. To do this, vassals join factions which pursue goals ranging from independence to lowering crown authority to pushing a pretender's claim or instituting a new succession law. As disaffected vassals join a faction, the power of the faction (measured in their army size vs liege's army size) increases. When it gets powerful enough, the faction leader has a decision to send their liege an ultimatum, a letter with the faction's demands. If the liege does not comply, war breaks out, and all faction members join the revolt against their liege.

Because vassals can only rebel against their direct liege, rulers need not be worried about the opinions of vassals under their direct vassals.

The faction a vassal will seek to join depends on a number of factors. Characters of the same culture and religion holding de jure territory make the most loyal vassals.

阶级制度

Estates of the Realm The estates of the realm depict the most important social classes of the Middle Ages - spanning from Christian Europe to the lands of India. During this timeframe, it was difficult for a person to move from a social class to another; this is also the case in Base icon CK2.png Crusader Kings II.

In the game, they are depicted as the three estates:

  • The clergy (First Estate), made up of religious heads, clerics, monks, nuns, priest(esses) and initiates.
  • The nobility (Second Estate), composed of landowners, their families, heirs and relatives - known as a dynasty
  • The commoners (Third Estate), made up of bandits, farmers, servants, craftsmen and merchants.

In India, characters are divided into three castes (or varnas) which correspond to the estates, as follows: Brahmins (the clergy), Kshatriyas (nobles) and Vaishyas (commoners). Castes are marked in-game by traits, and the Rajas of India.png Rajas of India DLC is required in order to play as a Dharmic character.

As for playable characters in CKII, up to the Jade Dragon.png Jade Dragon DLC, all noble rulers above baron rank (or equivalent) are playable. However, AI characters may hold all clergy and burgher titles above baronies. If a player eventually controls a baron ruler, or a cleric/burgher, it will result in instant game over.

The only exception (requiring Dlc icon the republic.png The Republic DLC) is a specific type of ruler: burghers of duke rank or above with a coastal capital, who are grand mayors of merchant republics with four other patrician families as their vassals. These five families are always contesting the title of grand mayor (or equivalent) of their merchant republic.

A character's gameplay is dependant on the religion they follow, their culture, and their government type. Therefore, actual titles of landed characters may adopt different names, according to a combination of those factors. Nevertheless, two titles which match the same rank grant similar privileges no matter the name. E.g., a duke and an emir are both acknowledged as duchy titles.

The definition of alternative names is set in the following priority order:

  1. Religion group
  2. Religion
  3. Government
  4. Culture group
  5. Culture.

If no specific factor type is found, then the default name (traced from the Christian Western Europe tradition) is used. Note that cultural and religious-based titles are based on the top liege's culture and religion, not the vassal's.

贵族

主条目:Nobles

Nobles Nobles normally rule over castles. They are characters associated with land acquisition via conquest or shrewd court manipulation.

  • In the feudal system, rulers of count-tier or higher are members of the nobility; they share a dynasty of successive descendants
  • In the Islamic world (requires the Dlc icon sword of islam.png Sword of Islam DLC), Iqta nobles are allowed to rule over castles, as well as temples with no penalties
  • Tribal nobles can only rule over tribes and benefit from empty holding slots, apart from the capital. They are known for their raiders and may adopt feudalism or found a merchant republic. The Dlc icon the old gods.png Old Gods or Holy Fury.pngHoly Fury DLC is required to play as a Pagan tribal ruler
  • Nomads are nobles who settle a single nomadic capital holding, and keep all other holdings empty to strengthen their hordes. As they manage their clans and ride freely over the Eurasian steppes, nomads are feared for their constant pillages, and they're allowed to move their capital more frequently (and carry along all buildings within it). The Horse Lords.png Horse Lords DLC is required in order to play as a nomad ruler.
  • In India, Dharmic nobles are composed of Kshatriyas. The Rajas of India.png Rajas of India DLC is required in order to play as a Hindu character.
  • In the Tibetan plateau, Monastic Feudal nobles are allowed to rule over castles, as well as temples with no penalties. Playing as a Bön non-nomad requires either the Dlc icon the old gods.png Old Gods or Jade Dragon.png Jade Dragon DLC.
因素 Key 男爵领 伯爵领 公爵领 王国 帝国
默认 男爵 / 女男爵 伯爵 / 女伯爵 公爵 / 女公爵 国王 / 女王 皇帝 / 女皇
宗教组 原始宗教 头人 酋长 / 女酋长
宗教 (改革的)洛姆瓦教 大酋长 / 女大酋长
宗教 (改革的)日耳曼多神教 侍从
宗教 (改革的) 斯拉夫多神教 大酋长 / 女大酋长
宗教 (改革的) 索米多神教 大酋长 / 女大酋长
宗教 (改革的) 长生天 大酋长 / 女大酋长
政体 僧侣封建制 (缺失) 阿波 / 阿姆 图波 / 图姆 杰布 / 杰蒙 赞普 / 赞蒙
政体 部落制 酋长 酋长 / 女酋长
政体,文化 部落制,萨克森 大酋长 / 女大酋长
文化组 阿尔泰文化组 汗王 / 汗努 可汗 / 可敦
文化组 阿拉伯文化组 瓦利 / 瓦利亚 谢赫 / 谢哈 埃米尔 / 埃米拉 苏丹 / 苏丹娜 巴迪沙阿
文化组 凯尔特文化组 小型 国王 / 女王 (独立状态)
文化组 达罗毗荼文化组 / 印度-雅利安文化组 庄主 / 女庄主 他俱罗 / 他俱罗尼 罗阇 / 罗尼 摩诃罗阇 / 摩诃罗尼 圣王 / 圣后
文化组 东非文化组 小型 国王 / 女王 (独立状态)
文化组 伊朗文化组 堡主 / 瓦利亚 马尔佐班 / 谢哈 总督 / 埃米拉 沙阿 / 女沙阿 万王之王
文化组 北日耳曼文化组 小型 国王 / 女王 (独立状态)
文化组 西非文化组 瓦利 法林 / 法林娜 法尔巴斯 / 法尔巴 曼萨 / 苏丹娜
文化组 西日耳曼文化组 小型 国王 / 女王 (独立状态)
文化 英格兰 / 撒克逊 / 爱尔兰 / 皮克特 / 苏格兰 伯爵(Earl)
文化 日耳曼 凯撒 / 凯撒琳
文化 希腊 公爵(Doux) 专制公 巴西琉斯 / 巴塞丽莎
文化 蒙古语 太师 酋长 大酋长 / 女大酋长 汗王 / 汗努
文化 纳瓦特尔 特乌库特里 / 特乌库特里 卡丕师奇 / 卡丕师奇 大卡丕师奇 / 大卡丕师奇 特拉托阿尼 / 特拉托阿尼 大特拉托阿尼 / 大特拉托阿尼
文化 诺斯 侍从 雅尔
文化 罗马 司令官 / 女司令官 伯爵(Comes) 公爵(Doux) 国王(Rex) / 女王(Regina) 奥古斯都 / 奥古斯塔
文化 罗斯 大公 / 女大公 沙皇 / 女沙皇
文化 突厥 提玛利欧特 / 提玛利欧塔 贝伊 / 巴彦 贝伊勒贝伊 / 贝勒巴彦 苏丹 / 苏丹娜 帕迪沙阿
职位 总督制 城镇总督 / 女城镇总督 (不可能存在) 省总督 / 女省总督 (不可能存在) 公国总督 / 女公国总督 总督 / 女总督 大总督 / 女大总督 (不可能存在)
职位,文化 总督制,拜占庭文化组 将军 / 女将军 都督(Exarch) / 女都督(Exarchessa) 大都督(Grand Exarch) (不可能存在)
职位,文化 总督制,罗马 总督(Governor) / 女总督(Governess) 资深执政官 / 女资深执政官 元首 / 女元首(不可能存在)

Note: The primary spouse of a ruler gets a minor title of "ruler consort", allowing them to use the gender-appropriate form of their spouse's ruler title. E.g., the wife of a sultan is called a "sultana." Similarly, "queen mother" and variants are available to the wives of deceased kings and emperors.


神职人员

主条目:Clergy

Clergy Clerics are members of the clergy and usually rule over temple holdings. Those characters are often associated with conversion, dealing with the Pope (if Catholic) or Patriarchs (if Orthodox), reforming religions (if Pagan), becoming one of the Caliphs, restoring priesthoods, fighting heresies, or managing the Hindu caste system.

  • Note that due to the melded status of church and state within the Muslim world, any Islamic character owning a mosque title while being of count rank or higher will simply be referred to as their noble counterpart. As such, while the titles mullah, ayatollah, grand ayatollah and grand mufti are defined in the files, they will not appear in the game. (accurate as of Monks and Mystics DLC). Also, note that since Dlc icon sword of islam.png Sword of Islam DLC, the caliph is no longer an emperor- or king-tier title, but a duke-tier title
  • Pagan female clerics are allowed to rule over temple holdings, except for Aztecs, Tengri and Zunists. It is possible to reform a Pagan faith, as long as enough holy sites are controlled. The Dlc icon the old gods.png Old Gods or Holy Fury.png Holy Fury DLC must be active to play as a Pagan non-nomadic ruler.
  • Characters who follow Judaism (requires Dlc icon sons of abraham.png Sons of Abraham DLC) or Zoroastrianism (requires Dlc icon the old gods.png The Old Gods DLC) are needed to control completely the Kingdom of Israel and the Persian Empire, respectively, to restore their priesthoods and reinstate their religious heads
  • In nomadic lands, it is common for a liege's vassals to follow different religions. Therefore, they cannot demand religious conversion or freely-revoke land from infidels. Nomads can also reform their religion, if they are Pagans. The Horse Lords.png Horse Lords DLC is required in order to play as nomads.
  • In India, Dharmic clerics are composed of Brahmins. The Rajas of India.png Rajas of India DLC is required in order to play as a Hindu character.
  • In the Tibetan plateau, characters tend to follow Buddhism, Bön or Taoism. Playing as a Buddhist non-nomad character requires the Rajas of India.png Rajas of India DLC; Bön characters require either the Dlc icon the old gods.png The Old Gods or Jade Dragon.png Jade Dragon DLC; Taoists require either Rajas of India.png Rajas of India or Jade Dragon.png Jade Dragon DLC.
Factor Key 男爵领 伯爵领 公爵领 王国 帝国
宗教组 基督教 主教 采邑主教 采邑大主教 王爵主教 帝皇主教
宗教组 犹太教 拉比 柯亨 拉班 纳西
宗教组 伊斯兰教 哈里发 (post-Sword of Islam) 哈里发 (pre-Sword of Islam)
宗教组 原始宗教 祭司 / 女祭司 大祭司 / 女大祭司 大祭司 / 女大祭司 巫王 / 巫后 巫帝 / 女巫帝
宗教 (Reformed) Aztec Shaman
宗教 (Reformed) Baltic Shaman Witch-King / Witch-Queen
宗教 Bön Lama / Priestess
宗教 Buddhist Bhikkhu / Bhikshuni Bhikkhu / Bhikshuni Bhikkhu / Bhikshuni Bhikkhu / Bhikshuni
宗教 (Reformed) Germanic Godi / Gydja Seidsman / Vala Fylkir (Reformed only, unique)
宗教 Hellenic Flamen / Vestal High Auger / High vestal Pontifex
宗教 Hindu Pujari Pujari Pujari Pujari
宗教 Jain Nirgrantha Nirgrantha Nirgrantha Nirgrantha
宗教 Manichean / Mazdaki Vahram
宗教 Orthodox Metropolitan Prince-Archbishop King-Bishop
宗教 Shia Mullah Ayatollah Grand Ayatollah
宗教 Slavic (unreformed only) Witch-King
宗教 (Reformed) Slavic Shaman
宗教 Sunni Mufti Sheikh Grand Mufti
宗教 (Reformed) Suomenusko Shaman Witch-King
宗教 (Reformed) Tengri Shaman
宗教 (Reformed) West African Priest / Priestess
宗教 Zoroastrian Herbad
宗教 (Reformed) Zunist Sun Guardian

市民

Burghers Burghers represent the common people and normally rule over city holdings. Burghers are responsible for a large part of the world's economy, as they control the largest source of money in the game - cities. They push no claims, unlike nobles, and are relatively isolationist.

  • They usually don't have much of an effect upon politics at large, except for duke-tier (or higher) burghers owning a coastal capital, because they become patricians - the rulers of merchant republics. There are usualy five patrician families campaigning for election victory in order to become the republican liege. Dlc icon the republic.png The Republic DLC is required in order to play as a patrician.
  • Patricians are allowed to rule over cities and castles
  • Muslim patricians (requires Dlc icon sword of islam.png Sword of Islam Expansion) cannot control temple holdings freely, but are unaffected by decadence, and are allowed to marry several wives
  • Nomad (requires the Horse Lords.png Horse Lords DLC) or tribal rulers may choose to found a merchant republic, as long as they follow an organized (or reformed) religion, and then settle down
  • In Dharmic societies, Hindu burghers are composed of Vaishyas. The Rajas of India.png Rajas of India DLC is required in order to play as a Hindu character.
Factor Key Barony County Duchy Kingdom Empire
Default Mayor or Patrician Lord Mayor Grand Mayor Prince Mayor Grand Prince
Religion group Muslim Wali Wali-Emir Wali-Malik
Culture group Byzantine or Latin Doge Serene Doge
Culture Roman Magister Praefect Tribune Consul Princeps

The alternative names for patrician lands in merchant republics are:

Factor Key Barony County Duchy Kingdom Empire
Default Palace City Republic Most Serene Republic Principality
Culture German Merchant League

其他政体的非男爵级封臣

It is possible to turn counties into tribes, republics or theocracies, government types that usually only rule barony-tier titles. The local ruler will have a -20 "Wrong government type" opinion penalty towards the feudal player character in many cases, but there can be benefits.

There are several ways to get non-feudal count+ vassals:

  • If the player character holds a county and have a vassal mayor or cleric there, they can grant the county to the burgher / cleric, causing the mayor's city (or cleric's temple) to become the new county seat and elevating them to lord mayor or prince-bishop
  • If the player character holds a county, as well as a city there, the player can right-click the city to set it as the new county seat. If the province title is granted to a courtier, they will create a republic government. The demoted castle can be given to the lord mayor (so they pay more taxes) or to another character (so the lord mayor has fewer troops to use against their liege)
  • By pressing a mayor's or bishop's claim.

部落制封臣

Tribes The most common objective of having tribal vassals is to have them convert tribes to castles quickly and cheaply. When using this strategy, it is important to select courtiers who share your culture and religion, as others will have elevated opinion penalties and thus not inclined to adopt feudalism.

Tribal vassals have little income of their own, so the process will be fastest if you fund the construction of Hillforts in their capital. Giving multiple tribal counties to one tribal vassal makes the process cheaper, as only their capital will need Hillforts (and the technology to build them). When giving a character a duchy or enough counties to create a duchy, grant the duchy's de jure capital first so they won't surprise you with a change of capital.

Alternatively, vassal tribes can be used to skirt the vassal limit and keep a pool of competent commanders. When using this strategy, it may be advantageous to select courtiers of a different religion, as they are less likely to adopt feudalism and are subject to free revocation.

For tribal lieges, direct tribal vassals are their main source of military power, as long as these vassals can be called to arms as allies.

共和制封臣

Republics Republics tend to have more income and pay taxes at a higher rate, but provide fewer troops as levies.

Normal republics use Open Elective succession, with all titles going to the man in court with the highest age + prestige. The player can remove candidates by granting land to them or add candidates through matrilineal marriage. Burghers do not seek out marriages, but will accept marriage proposals as long as they are at least 25 years old.

Coastal republics which are at least duke-tier become merchant republics and can build trade posts that improve the economy along the liege's entire coast. See Creating vassal republics for strategies.

Merchant republics should aim to have as many republican vassals as possible; they can boost their military power though Dlc icon legacy of rome.pngretinues.

神权制封臣

Theocracies Like republics, a theocracy provides more taxes than troops, and generally uses Open Elective succession.

A ruler of a powerful vassal theocracy can serve as the Lord Spiritual, potentially relieving some of the pressure to put incompetent feudal vassals in important council positions.

Catholics can use Free Investiture to ensure both loyalty and competence. Catholics can also use their major vassal theocracies to control the election of Popes, "secular power" being a major factor in selection of cardinals. However, Catholics should keep in mind that bishops pay taxes to the Pope and stop providing troops if they like the Pope more than their liege. Catholic kings and emperors might want to "invest" in a vassal theocracy for their (and their descendants') Holy Fury.pngcoronation, as the Pope's demands in return for coronation can be exorbitant.

雇佣兵和骑士团封臣

Mercenaries The player may have an opportunity to vassalize a mercenary company or holy order. With vassalization, their company becomes available at 1/5 the normal cost and also prevents anyone else from hiring them. They are considered feudal for the purpose of comparing government types, and will not resent having a normal feudal liege.

With Dlc icon sons of abraham.png Sons of Abraham DLC and "Imperial Administration" law (or Iqta government), having a vassal holy order has an additional benefit: Free castles. A holy order grandmaster owning less than 10 realm size may spend 300 wealth to build a castle in any county belonging to a ruler of their religion. It is possible to use "Imperial Administration" law to retract these castles, allowing them to build new ones. However, to keep holy orders as vassals, the liege should ensure that grandmasters have at least -20 opinion of them.