Empire of Byzantium
Map by Regalman
Eastern Orthodoxy
Charismatic, Imperialistic
Alternate Leader of:


Byzantium led by Justinian I is a custom civilization mod by JFD and Janboruta, with contributions from Shadow Pope, Regalman, Urdnot_Scott, and (allegedly) SgtWolf.

This mod requires Brave New World, and works best with Gazebo's Community Patch. It does not replace Theodora's Byzantium.



Existing for more than 1,000 years, the Byzantine Empire, centered in the legendary city of Constantinople, was initially formed as the eastern seat of power for the mighty Roman Empire. Located along the trade routes connecting Europe to Asia, Constantinople grew to become the primary trade hub in the region, flourishing despite the conflicts that led to the decline of Rome in the west. Inspired by a number of memorable rulers, the Byzantine Empire was also a source of great cultural growth along the eastern Mediterranean, its affluence allowing for grand displays of art, architecture, science, and music.

Justinian I

JFD Justinian Diplo

Leaderscene by Janboruta

Justinian the First, known as Flavius Petrus Sabbatius Iustinianus in Latin, was emperor of the Byzantine Empire from 527 until his death in 565. His four decades of rule marked the greatest expansion of the Byzantine Empire since its split with the Roman Empire and a sweeping revival in the Christian religion.

The Empire thrived under Justinian. Thanks in no small part to the able command of Belisarius, Emperor Justinian's reach spread from Constantinople to Southern Spain, with North Africa and Italy all falling under the Byzantine grasp. Justinian's reign marked a high point for the Byzantine Empire, as shortly after his death, much of the land conquered in his name was lost. War with powerful Germanic tribes and neighboring Persia would cost the empire much of its hard-fought gains.

Dawn of Man

Blessings upon Christ's favoured son, Saint Justinian, Emperor of Byzantium and champion of Rome. Rome had been lost for some two centuries until your ambitious renovatio imperii. Her laws, once the beacon of the civilized world, had too fallen into disrepair. But your great feats of battle would mark Rome's closest restoration, and the great Corpus Juris Civilis would form the basis of Europe's laws for centuries to come. Yours is truly a legacy worthy of the Caesars that came before you.

Great emperor, the glory of Rome once more awaits your divine government. Can you restore her fractured lands? Can you bring law to the corners of her empire? Can you build a civilization that will stand the test of time?

Introduction: "I am Justinian I, Emperor of Byzantium. I expect you've come to witness the final sanctury of Rome? Well, you've found it."

Introduction: "Greetings. I am Justinian I, Emperor of Byzantium. Have you come to borrow some of my law books? Or to take part in my arena perhaps? Or shall we stroll the training yards?"

Defeat: "What will you do now? Will you pursue the dream that you have taken from me?"

Defeat: "My armies may lie defeated, but the fires that inspired me to seek out Rome will not be extinguished."

Unique Attributes

Byzantium (Justinian I)

Art by Janboruta

Renovatio Imperii

Barracks, Courthouses, and Temples can be constructed for other cities from the Capital Capital. On completion, these buildings yield Greatperson Great General Points.


Art by Firaxis

Cataphract (Knight)
  • +5 Strength Combat Strength.
  • May use defensive terrain.
  • -1 Moves Movement.
  • +50 Production Production cost.
  • +10% Production Production per city under enemy control.
  • Smaller penalty versus cities (25%).

Art by unknown and Janboruta

Hippodrome (Circus)
  • .+15 XP for land units.
  • Earn Gold Gold when a unit is trained (not purchased) in this city, equal to their starting experience.
  • Consumes 1 Horses Horse resource, but does not require Horse or Ivory nearby.
Changes to Byzantium (Justinian I)

Art by Firaxis

Patriarchate of Constantinople

When founding a Religion Religion, may choose one additional Belief. Receive a free Great Prophet at Theology.


Art by Janboruta

Stoudion (Garden/Monastery[1])
  • +2 FaithIcon Faith.
  • Missionaries purchased in this city begin with +1 Moves Movement and have no Sight penalty.




Peace Theme War Theme
Crusader Kings II Soundtrack - Komnenós

Crusader Kings II Soundtrack - Komnenós

"Komnenos" from the soundtrack of Crusader Kings II.

Mod Support

Mod Support
Community Balance Patch
Ethnic Units
Map Labels
Unique Cultural Influence
Wish for the World

Events and Decisions

Compile the Corpus Juris Civilis
Law cannot function in tatters. We must compile all decrees past and present into a single work if we are to govern a civilized and law-abiding empire.
  • Player must be Byzantium (Justinian I).
  • Must have researched Writing/Must have a Government.[2]
  • May only be enacted once per game.
  • 400 Gold Gold.
  • 3 Magistrates Magistrate
  • Grants the Legalism and Citizenship policies. For any policies that you already have, receive a free CultureIcon Policy instead/Passes the Civil (System) Reform without incurring Cooldown.[3]
  • Chanceries and Magistrate's Courts can also be constructed for other cities from the Capital Capital.[4]
Restore the Roman Empire
The once great empire that long ago spanned the world is within our reach. We need only seal her name upon our laws and the Roman Empire and her pillars of glory shall be reborn in our image.
  • Player must be Byzantium (Justinian I).
  • Must have a Government.[5]
  • Must have at least 8 cities (on Standard).
  • May only be enacted from the beginning of the Renaissance Era.
  • May only be enacted once per game.
  • 2000 Gold Gold.
  • 2 Magistrates Magistrate
  • Civilization becomes known as Rome.
  • A Goldenage Golden Age begins.
  • Barracks, Courthouses, and Temples yield +2 CultureIcon Culture and +1 Happy Happiness/+2 Tourism Tourism.[6]
  • Passes the Empire (State) Reform without incurring Cooldown.[7]

Unique Cultural Influence

"Our people are now visiting your basilicas and studying your civil law codes. I am worried the rest of the world will soon yield to the eerie ways of your empire."

Full Credits List

CivFanatics Homepage
Steam Workshop
Latest Version: v 1
Last Updated: 13 December 2016

  • JFD: Author.
  • Janboruta: Art (Civ Icon, Leader Icon, Unique Component Icons, Leaderscene).
  • Regalman: Art (Map).
  • Urdnot_Scott: Design (parts of UA, Cataphract).
  • Shadow Pope: Research (Colony List).
  • SgtWolf: Research (City List).
  • Andreas Waldetoft: Music[8]
  • Typhlomence: UniqueDiplomacyUtils.lua.[9]

Notes and References

  1. Requires RtP: Piety.
  2. Rise to Power: Sovereignty
  3. Rise to Power: Sovereignty
  4. Rise to Power: Sovereignty
  5. Rise to Power: Sovereignty
  6. Rise to Power: Sovereignty
  7. Rise to Power: Sovereignty
  8. Komnenós
  9. Lua for Unique Diplomacy Entries
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