Difference between revisions of "Roman Empire"

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(Strategy: Added names of the 2 of the island provincies of iberian region, one was left and the other one wrong.)
(Tags: Mobile edit, Mobile web edit)
(Formation: no coring needed)
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* Owns the following [[regions]]:
* Owns the following [[regions]]:
** Italy, France, Iberia, Balkans, Anatolia, Mashriq
** Italy, France, Iberia, Balkans, Anatolia, Mashriq
* Owns the following [[core province]]s:
* Owns the following [[province]]s:
** Fez, Tunis, Cairo, London, Yorkshire, Zeeland, Vienna
** Fez, Tunis, Cairo, London, Yorkshire, Zeeland, Vienna
|effect = This country:
|effect = This country:

Revision as of 05:46, 24 May 2016

Empire rankRoman Empire
Roman Empire.png
Primary culture
Roman (Lost Cultures)

Capital province
Rome (118)

Feudal Monarchy Government monarchy.png

State religion

Technology group
WesternWestern technology group
Roman ideas
Traditions.png Traditions:
+5% Discipline
+1 Yearly legitimacy

National unrest.png Pax Romana

−1 National unrest

Diplomatic reputation.png Legacy of Rome

+2 Diplomatic reputation

Stability cost modifier.png S.P.Q.R.

−20% Stability cost modifier

Land force limit modifier.png The Roman Legions

+15% Land force limit modifier
+10% Infantry combat ability

Production efficiency.png Roman Architecture

+20% Production efficiency

National tax modifier.png Imperial Bureaucracy

+10% National tax modifier

Core-creation cost.png Imperium Sine Fine

−20% Core-creation cost

Idea bonus.png Ambition:

+33% National manpower modifier

Historically, the Roman Empire was the dominant power in Europe in the first few centuries AD. While the Western Roman Empire ceased to exist long before the era covered by Europa Universalis IV, the Eastern Roman Empire continued to survive as Byzantium. Any Christian or Pagan nation can restore the Roman Empire by decision after re-conquering most of the historical Empire. The other way to play the Roman Empire (and, before patch 1.16, the only way) is to restore the Roman Empire as Byzantium in Crusader Kings II and converting the save to EU4.


Execute decision.pngRestore the Roman Empire

Potential requirements

Roman Empire does not exist.
This country:


This country:

  • Is not a subject nation.
  • Is not a nomad nation
  • Is not at war.
  • Owns the following regions:
    • Italy, France, Iberia, Balkans, Anatolia, Mashriq
  • Owns the following provinces:
    • Fez, Tunis, Cairo, London, Yorkshire, Zeeland, Vienna


This country:

  • Changes country to Flag of Roman Empire Roman Empire.
  • Capital set to Rome
  • Primary culture set to Roman
  • All owned provinces are removed from the Holy Roman Empire.
  • Gains Prestige.png50 prestige.
  • Gets the modifier “Increased Centralization” for 20 years with the following effects:
    • Autonomy.png−0.05 Monthly autonomy change
    • National unrest.png+1 National unrest
  • Changes government rank to Empire rank.
  • Gains a core on Rome.


The Roman Empire does not exist at any start-date, and the formation requirements are particularly onerous. While forming it is possible as any Christian or Pagan, it will be relatively easier for large countries in the Mediterranean such as Castille or France. Conquest of the northern half of Italy should wait until after the Shadow Kingdom event takes it out of the HRE. As a Catholic, it is prudent to wait with taking Rome itself until all other requirements are met. It might be in order to note that the islands of Azores, Madeira and Canary Islands are part of Iberian region and are therefore needed to form the Roman Empire. Same goes for tiny islands in Aegean Sea, which are part of the Balkan region.

Consequences of forming the Roman Empire

The Roman Empire is specifically exempted from the penalties Catholics get for owning Rome. Forming the Roman Empire switches the primary culture to Roman. It is impossible to switch back using the Accept Cultural Shift decision. Because of the large areas that need to be owned to form the Roman Empire, it is likely that the original primary culture will no longer be an accepted culture. This may result in income loss. Note that Roman is part of the "Lost Cultures" group, not in Latin, as might be expected.

Importing from CK2

One can export a saved game from Crusader Kings II and import it into Europa Universalis IV with the EU4 Save Converter DLC. To do so, one would have to play as or become the Byzantine Empire in Crusader Kings II, reconquer a set amount of duchies, then select a decision to restore the Roman Empire (with moving the capital to Rome and mending the Orthodox-Catholic Schism as optional decisions). This is difficult, since many of the territories required are far outside the De Jure reach of the Empire. Also, most territories are either held by Muslims who will band together in a jihad to repulse the Byzantines, or Italian city-states capable of hiring large amounts of mercenaries. For a full guide to forming the Empire in CKII, see here.


If the average technological advances in the entire realm passes a certain point, the Empire's technology group will be Western instead of Eastern after transfer to EU4.

Capital, Culture, Religion

The capital, state culture and state religion will be transferred over from CKII. This usually means that either Rome or Constantinople will be the capital, and the state religion and culture, reliant on the culture and religion of the current Emperor, will usually be Greek and Orthodox respectively. While the player can groom the Emperor to be a different Culture or Religion from the education mechanic, since the Religion and Culture of provinces carries over as well, this can cause a higher chance of rebellion and decreased income and manpower. If the Emperor is Catholic but the rest of the Provinces are Orthodox, there is a high chance of Religious Revolts.

Country guides

Central African technology group Central African.png Kuba.png KubaMutapa.png Mutapa
East African technology group East African.png Ethiopia.png EthiopiaMogadishu.png Mogadishu
Muslim technology group Muslim.png The Mamluks.png MamluksMorocco.png MoroccoTlemcen.png TlemcenTunis.png Tunis
West African technology group West African.png Air.png AirMali.png Mali

Eastern technology group Eastern.png Jerusalem.png Jerusalem
Muslim technology group Muslim.png Arabia.png Arabia Ardabil.png Ardabil Hisn Kayfa.png Hisn Kayfa Oman.png Oman
Indian technology group Indian.png Assam.png Assam Bahmanis.png Bahmanis Bengal.png Bengal Orissa.png Orissa
Chinese technology group Chinese.png Bali.png Bali Brunei.png Brunei Dai Viet.png Dai Viet Japan.png Japan Khmer.png Khmer Korea.png Korea Majapahit.png Majapahit Malaya.png Malaya Pagarruyung.png Pagarruyung Pasai.png Pasai Sunda.png Sunda
Nomadic technology group Nomadic.png Jianzhou.png Jianzhou Timurids.png Timurids Uzbek.png Uzbek

Western technology group Western.png United States.png United States
Mesoamerican technology group Mesoamerican.png Maya.png Maya
North American technology group North American.png Caddo.png Caddo Cherokee.png Cherokee Iroquois.png Iroquois

Andean technology group Andean.png Chachapoya.png Chachapoya Cusco.png Cusco Muisca.png Muisca
South American technology group South American.png Mapuche.png Mapuche