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帝国是 
王国风云2中最高等级的领地头衔，高于王国。这个头衔只被皇帝级别角色持有。皇帝（或同等等级）的肖像有一个由宝石装饰的金色边框。 
- 控制该头衔至少80%的法理领土
- 持有两个王国头衔，或者一个帝国头衔
- 花费600财富和400虔诚（或等价物）（角色积累的虔诚越多财富花费得越少，当有1000虔诚时有50%的折扣）
- 遵守特定的宗教和/或文化条件（自从patch 2.0以来,大多数条件仅适用于AI）
- 符合任何其他条件
帝国过于庞大，难以建立。尽管如此,皇帝能够附庸其他国王（或者相同等级）作为封臣的能力使管理一个庞大领地相当容易，因为他们有一次性将整个王国王国的法理吸收到帝国内的能力。基督教皇帝在成功索取对立教宗宣称之后可以附庸宗教领袖。通过授予各个军事修会法理公国, 基督教皇帝可以轻松的恐吓异端和异教领主。信仰祆教的皇帝统治波斯帝国后可以重立至高祭司长做为信仰的宗教领袖。一旦完全统治波斯帝国法理，他们可以宣布自己是萨奥希扬特，也就是救世主,这可以增强他们及后代在祆教封臣心中的地位，即获得特殊血脉。
另外的，处于法理帝国内或者与皇帝文化相同的独立公爵更乐于接受来自皇帝的外交行动。
拜占庭帝国在任何开局时间都会存在；神圣罗马帝国在1066年之后存在。
在 
查理曼剧本的开局时间769年,阿巴斯帝国刚刚获得权力并且处于上升期，神圣罗马帝国尚未形成但是可以通过决议建立。在东方，强大的吐蕃帝国笼罩着他弱小的邻居。
逝往神灵在867年开始，阿拉伯帝国处于腐朽的阿巴斯王朝控制之下，同时神圣罗马帝国仍需通过决议成立。到目前为止，吐蕃帝国已经陷入战乱状态。
在1066年，阿拉伯帝国已经分崩离析。法蒂玛王朝控制埃及和相当一部分的前朝领土。在1186年，印度的罗阇萨傥那帝国崛起。拉丁帝国存在于1204到1061年之间。蒙古帝国在1206年之后出现在地图之上，在游玩早期剧本时，也可以在1210年之后作为一个游牧部族诞生。蒙古帝国的继承人金帐汗国、伊儿汗国、察合台汗国在1227年末出现。德干帝国只会出现在最后的开局日期1337年，也就是百年战争。
如果 
马上诸王扩展包运行，将会有更多帝国存在。独立的游牧统治者（可汗）也会拥有帝国级头衔。系统检测到新的独立可汗时会自动给予其帝国级名誉头衔（当 查理曼DLC运行时帝国以首都地产文化命名）。
帝国等级解锁的能力
皇帝有两种额外可用的能力,他们与法律统治者能力相关：
- 帝国管理：自动获得公国总督法并且可以剥夺公国总督头衔，无惩罚收回封臣, 可以收回公国头衔(不需要 查理曼DLC),以及大量封臣上限奖励（+25；与公国总督法 -10 相加，净增加+15）。
- 总督（需要 查理曼DLC）：他们是终身制的头衔，并在总督去世时归还给皇帝，皇帝可能通过王国总督法（-5 封臣上限）或者公国总督制和王国总督制（-10 封臣上限）。
这些法律在直辖领法律界面中可见；如果 
御前会议DLC可用，玩家在领地法界面也可以找到。
拜占庭帝国开局颁布帝国政府法和公国总督法。
Nomenclature
The proper title of emperor-rank character and their respective land titles are generated according to the combination of their religion, government type, and culture, for instance:
- The Byzantine Emperor is called basileus if their culture group is Byzantine
- A German emperor-tier character is known as kaiser, while a Russian liege is tsar
- An Arabic emperor is known as badshah, while a Turkish liege is padishah
- An Iranian emperor is shahanshah and an Indian liege is called samrat
- An Altaic emperor is known as khagan, while a Tibetan liege is called tsenpo
- A merchant republic liege who attains the emperor-tier title is known as grand prince.
Custom empires
If the Charlemagne DLC is active, rulers can create a custom de jure empire.
This decision is available to an independent king with 8,000 prestige as well as either 180 holdings in their realm, or else three kingdom titles. Custom empires are named after, and take the color of, their creator's primary kingdom (although they can be renamed by owning the Customization Pack DLC).
When formed, all kingdoms either held or entirely controlled by their creator ruler become de jure vassals of the custom empire, so long as their original de jure empire does not exist.
帝国列表
| 法理帝国 | |||||||
| CoA | 帝国 | 首都 | 法理王国 | 特殊要求 | AI额外要求 | ID | 替代名称 |
|---|---|---|---|---|---|---|---|
|
阿比西尼亚 | 贡德尔(883) | 阿比西尼亚，努比亚 | 是埃及，努比亚及阿比西尼亚国王 | 东非文化组 | e_abyssinia | |
|
阿拉伯帝国 | 大马士革(728) | 阿拉伯，耶路撒冷，埃及，也门 769 only:马格里布，阿非利加 |
阿拉伯文化组 | e_arabia | ||
|
旁伽罗帝国 | 罗叉摩那伐底 (1151) | 旁伽罗，毗诃罗，共陀婆那，迦摩缕波，奥里萨 | 印度帝国不存在 | e_bengal | ||
|
不列颠尼亚 | 米德尔塞克斯(32) | 英格兰，爱尔兰，苏格兰，威尔士 | 英格兰，盎格鲁－撒克逊，诺曼文化，或者凯尔特或北日耳曼文化组 | e_britannia | 阿尔巴，普里戴恩 | |
|
拜占庭帝国 | 君士坦丁堡(496) | 安纳托利亚, 亚美尼亚, 保加利亚, 克罗地亚, 伊庇鲁斯, 格鲁吉亚, 希腊, 塞尔维亚, 西西里，色雷斯, 特拉比松(& 塞浦路斯,萨鲁汗,特里纳克里亚,泰凯,奥斯曼,罗姆,门泰谢,卡拉曼,格尔米扬,埃雷特纳,艾登,钱达尔) | 罗马帝国不存在，拉丁帝国不存在，必须信仰东正教或者（改革）希腊多神教。 | e_byzantium | ||
|
喀尔巴阡 | 佩斯(522) | 匈牙利,瓦拉吉亚 | e_carpathia | |||
|
德干帝国 | 摩若契吒(1210) | 案达罗,羯罗拏吒,楞迦,摩诃剌侘,耽弥罗迦摩,得楞伽那 | 印度帝国不存在 | e_deccan | ||
|
法兰克 | 巴黎(112) | All starts:阿基坦,法兰西,布列塔尼,勃艮第 Additionally in 769:弗里西亚,洛塔林吉亚 |
除了:阿基坦,法兰西,布列塔尼,勃艮第另一个王国头衔 | 法兰西，诺曼，奥克文化 | e_france | 高卢 |
|
日耳曼尼亚 | 拿骚(121) | 769:巴伐利亚,卡林西亚,日耳曼,萨克森(& The Hansa) All other starts:无 |
萨克森或中日耳曼文化组 | e_germany | ||
|
Hispania | Toledo (197) | All starts: Andalusia, Navarra 769 and 867: Asturias from 769 to 1147: Badajoz from 769 to 1212: Galicia, Valencia from 1066: Aragon, Castille, León from 1109: Portugal |
No de jure kingdom is held by an infidel (with  Holy Fury)
|
e_spain | ||
|
Holy Roman Empire | Jülich (90) | 769: None All other starts: Bavaria, Carinthia, Frisia, Germany, Lotharingia (& The Hansa) Additionally from 15 September 1066 on: Bohemia |
Can only be created by special decisions. 867 on: requires Catholic or Fraticelli religion, German or Dutch culture, neither the HRE nor Francia exists, the ruler be adult, not a prisoner, not Incapable, 1000 Prestige, 180 Realm Size, Kingdom of Germany and one other Kingdom title, and 2 years of wealth 769: requires Catholic or Fraticelli religion, not holding the Byzantine Empire, the ruler be adult, not a prisoner, not Incapable, 1000 Prestige, 220 Realm Size, holding the Kingdom of Italy or Empire of Italia, a Kingdom or Empire title within Francia, Germania, Britannia, or Hispania, no Christian holder of Francia, Germania, Britannia, or Hispania other than the ruler, 100 opinion with your religious head, and 2 years of wealth. |
e_hre | ||
|
Italia | Rome (333) | Italy, Romagna (Papal States in its place in most bookmarks), Sardinia-Corsica, Venice (& Genoa, Pisa, Naples). |
King of Sicily. (This requirement changes based on de jure drift. You must own all of the following kingdoms if not titular and not de jure Italia: Kingdoms of Sicily, Naples, Trinacria, Italy, Sardinia-Corsica, Romagna, Venice.) |
Italian culture | e_italy | |
|
Kanem-Bornu | None | Hausaland, Kanem | e_kanem | |||
|
Maghreb | Marrakech (843) | 769: none (titular) All other starts: Africa, Maghreb |
Berber culture | e_maghreb | ||
|
Mali | Timbuktu (911) | Ghana, Mali, Songhay | West African culture group | e_mali | ||
|
Persian Empire | Esfahan (646) | Al-Jazira, Daylam, Iraq, Kabulistan, Khorasan, Persia, Sistan | Iranian culture group | e_persia | Parthicum | |
|
Pontic Steppe | Saray (619) | Alania, Crimea, Khazaria | Altaic culture group, Alan culture or Hungarian culture | e_pontic_steppe | ||
|
Rajasthan | Kanyakubja (1356) | Delhi, Gujarat, Kosala, Malwa, Punjab, Rajputana, Sindh | Empire of India does not exist. | e_rajastan | ||
|
Russia | Kiev (547) | Chernigov, Galicia-Volhynia, Kievan Rus, Novgorod, Vladimir | East Slavic, North Germanic or Finno-Ugric culture groups | e_russia | Suomi | |
|
Scandinavia | Uppland (290) | Denmark, Estonia, Finland, Lapland, Norway, Sweden | North Germanic culture group or Finnish culture | e_scandinavia | ||
|
Tartaria | Sarkel (594) | Cumania, Mongolia, Sibir | Altaic culture group | e_tartaria | ||
|
Tibet | Lhasa (1498) | Guge, Kashmir, Kham, Nepal, Yarlung, Xia | e_tibet | Bodchenpo, Tufan, Tubo | ||
|
Turan | Khiva (626) | Khotan, Oghuz, Transoxiana, Zhetysu | e_turkestan | Turkestan | ||
|
Wendish Empire | Krakow (527) | All start dates: Lithuania, Poland, Pomerania Additionally at 769 start: Bohemia Additionally at 867 start: Bohemia, Great Moravia |
West Slavic or Baltic culture groups | e_wendish_empire | ||
|
Volga-Ural | Bulgar (610) | Nenetsia, Perm, Volga Bulgaria | e_idel_ural | |||
| TITULAR EMPIRES | |||||||
| CoA | Empire | Capital | De Jure Kingdoms | Requirements | AI additional requirements | ID | |
|
Aztec Empire | None | N/A | Impossible to create. Always exists once activated. If the Sunset Invasion DLC is active, it can show up somewhere on the Atlantic Coast between 1250 and 1350. | Never | e_mexikha | |
|
Chagatai | Samarkand (903) | N/A | Impossible to create. Exists if you start after 1227. | Never | e_chagatai | |
|
Golden Horde | Saray (619) | N/A | Impossible to create. Always exists once activated. Exists if you start after 1227. | Never | e_golden_horde | |
|
Ilkhanate | Esfahan (646) | N/A | Impossible to create. Always exists once activated. Exists if you start after 1227. | Never | e_il-khanate | |
|
|
India | None | N/A (Inherits everything in India region when formed) | Activated and created by the "Become Samrat Chakravartin" decision. Rajastan, Bengal Empire, and Deccan Empire either do not exist or are held by you. Completely control the India region. 500 gold, 1000 prestige. | e_india | ||
|
Latin Empire | Constantinople (496) | N/A | Catholic religion or Catholic heresy. Neither Byzantine Empire nor Roman Empire exists. Control Kaliopolis and Thrake. | e_latin_empire | ||
|
Mongol Empire | Kara-khorum (1457) | N/A | Activated and created by the "Become Genghis Khan" decision. Must be a nomadic Mongol with 1500 prestige and control of 35 counties. Always exists once activated. Exists if you start between year 1206 and 1227. Almost certainly arrives in Mongolia between 1210 and 1218, if it doesn't already exist. | e_mongol_empire | ||
|
Outremer | Jerusalem (774) | N/A (inherits de jure land of ruler's kingdoms in Near East region and de jure kingdom of Egypt if Egypt is fully controlled) | Activated and created by the "Form an Empire of the Outremer" decision. Requirements: 5000 prestige, Catholic or Fraticelli, not Byzantine/Roman/Holy Roman emperor, king or emperor title in Near East region, complete control of Near East region, County of Jerusalem in demesne. |
Never | e_outremer | |
|
Roman Empire | Rome (333) | N/A (inherits de jure land of player's main title when formed) | Activated and created by the "Restore Roman Empire" decision. Requires Legacy of Rome DLC, Christian religion, 3000 Prestige, full control of duchies of Latium, Venice, Ferrara, Sicily, Genoa, Capua, Apulia, Thrace, Antioch, Jerusalem, Alexandria, Athens, Tunisia and Croatia. With Holy Fury DLC there is also an option to revive Hellenism under a Greek, Italian or Roman Christian Emperor. | e_roman_empire | ||
|
Seljuk Empire | Esfahan (646) | N/A | Impossible to create. Seljuk can appear between 965 and 1200, and if he is successful forms this empire. | Never | e_seljuk_turks | |
|
Slavic Union | Kiev (547) | N/A (inherits as de jure kingdoms of Bohemia, Poland, Chernigov, Galicia-Volhynia, Kievan Rus, Novgorod, Vladimir and Pomerania if Pomerania is fully controlled) | Activated and created by the "Form the Slavic Union" decision. Requirements: 5000 prestige, king or emperor title, complete control of Bohemia, Poland, Chernigov, Galicia-Volhynia, Kievan Rus, Novgorod, Vladimir, culture must be one of Russian, Polish, Bohemian, Volhynian, Ilmenian, Severian, Pomeranian. |
Never | e_lechczechrus | |
|
Timurids | Esfahan (646) | N/A | Impossible to create. Timur can appear between 1350 and 1370, and if he is successful forms this empire. | Never | e_timurids | |
|
Western Protectorate | Dunhuang (1448) | N/A | Impossible to create, for it always exists as a Chinese tributary. Its Chinese Bureaucracy government type makes it unplayable. In games without  , it is largely inactive although it still has a court, and only has a physical presence in 769 and from February 1227 onwards.
|
Never | e_china_west_governor | |