Roman Empire

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

Capital province
Rome (118)

Feudal Nobility Government monarchy.png

State religion

Technology group
WesternWestern technology group
Roman ideas
Ambox outdated info.png Please help with verifying or updating this infobox. It was last verified for version 1.33.

Traditions.png Traditions:

+5% Discipline
+1 Yearly legitimacy
+1 Yearly devotion
+0.3 Yearly republican tradition

National unrest.png Pax Romana

−2 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
+5% Administrative efficiency

Core-creation cost.png Imperium Sine Fine

−25% Core-creation cost
−5 Years of separatism

Idea bonus.png Ambition:

+33% National manpower modifier

Historically, the Roman Empire was the dominant great power in Europe in the first few centuries AD and the first major empire of its kind and left behind a legacy that would form the very foundation for European civilisation of subsequent ages. 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 Flag of Byzantium Byzantium. Any Christian or Pagan nation other than the Flag of Holy Roman Empire Holy Roman Empire or the Flag of Papal States Papal States can restore the Roman Empire by decision after re-conquering most of the historical Empire. The other way to play the Roman Empire is to restore the Roman Empire as Flag of Byzantium Byzantium in Crusader Kings II and converting the save to EU4 using the Europa Universalis 4 Save Converter.

Ironically the Roman Empire can reform into the Flag of Holy Roman Empire Holy Roman Empire by becoming emperor of the HRE and revoking the privilegia and centralising the Empire.

Additionally, the Roman Empire has a very special effect upon formation, as it will convert all provinces of the nation's primary culture group to Roman Culture and set that as the primary culture. This is unique because this is the only way to rediscover a lost culture aside from custom nations and console commands.

If the Roman Empire gains a parliament through any reform that grants one (such as Parliamentarism for example), it will be named the Senate, as a reference to the Roman Senate which existed throughout the Republican and Imperial periods of Rome.

Formation[edit | edit source]


Execute decision.pngRestore the Roman Empire

Not since the Romans in the second century has one empire commanded the entirety of the Mediterranean and beyond. If we claim this land, we can scoff at whatever pretenders may claim in Constantinople or the Holy Roman Empire and proclaim ourselves the true successors of Rome.

Potential requirements

The Flag of Roman Empire Roman Empire does not exist.
The country:

If the country is AI-controlled, it:

  • is not a custom nation.

Playing with normal or historical nations.


The country:

Needed provinces to form the Roman Empire


The country:

  • becomes the Flag of Roman Empire Roman Empire.
  • gains Yearly prestige.png 50 prestige.
  • gets the Msg event.png event ‘New Traditions & Ambitions’, unless it has custom ideas.
  • increases rank to Empire rank empire.
  • changes its Primary culture.png primary culture to Roman.
  • has all owned provinces of its Primary culture.png Culture Group changing to Roman culture.
  • removes all owned provinces from the Holy Roman Empire.
  • gets “Increased Centralization” for Time Icon.png 20 years, giving:
    • Autonomy.png −0.05 monthly autonomy change,
    • National unrest.png +1 national unrest.

If Roma (118) is part of the HRE, but its owner is not a member then:

  • the province is removed from the HRE.
  • the Holy Roman Emperor:
    • gets the opinion modifier “Removed provinces from the Empire” towards the owner, worth Opinion.png−50 opinion with a yearly decay of 1.
    • loses Imperial authority.png1 imperial authority.

Roma (118):

  • becomes the new capital of the owner country.
  • gets a core on Roma.

AI will always take this decision

Achievements[edit | edit source]

Mare Nostrum icon
Mare Nostrum
Restore the Roman Empire and own the entire Mediterranean and Black Sea coast lines.
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