- +5% Discipline
- +1 Yearly legitimacy
- −1 National unrest
- +2 Diplomatic reputation
- −20% Stability cost modifier
- +15% Land force limit modifier
- +10% Infantry combat ability
- +20% Production efficiency
- +10% National tax modifier
- −20% Core-creation cost
- +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 other than the Holy Roman Empire or the Papal State 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 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 Holy Roman Empire by revoking the privilegia.
Additionally, the Roman Empire has a very special effect upon formation, as it will convert all provinces of the nations primary culture 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.
Restore the Roman Empire
The Roman Empire does not exist.
If the country is AI-controlled then it
If the country is “The Hanseatic League”, restore its name to “Roman Empire”
All your owned provinces will cease to be part of the Holy Roman Empire.
The country removes all its provinces from the Holy Roman Empire.
If the country does not have custom ideas