Byzantium is a strong military and religious Civilization. We're going to overview the Civilization, learn its strengths and how to play it throughout the game. This guide is focused on the Gathering Storm expansion (Byzantium & Gaul pack).
To win Civilization VI as Byzantium you must focus on religion and war, the civilization synergics these aspects extremely well. Convert enemy cities to your religion and then conquer them using cavalry, which in the case of Byzantium led by Basil II (only leader as of now), ignores defenses if the city follows the same religion. Focus heavily on Holy Sites and Hippodromes (Entertainment Complex replacement). The Civilization weakness is its lack of gold generation, to solve this pillage, sell diplomatic favor and choose the Tithe (+3 Gold for each city following the religion) belief.
Byzantium enjoys huge religious bonuses, which can be conveniently converted into culture
+3 Combat and Religious Strength for all units for each Holy City converted to Byzantium's Religion (including Byzantium's own Holy City) Byzantium's Religion is spread to nearby cities when an unit from an enemy civilization or city-state is defeated. +1 Great Prophet point from Holy Sites.
"I have no intention of being an indifferent looker-on if the distant Powers have the idea of dividing up Africa, for Byzantium has been for more than fourteen centuries an island of Christians in the middle of a the sea of pagans"
Heavy and light cavalry units deal full damage when attacking cities following the same religion as Byzantium. Gain the Tagma unique unit with Divine Right.
Byzantium unique heavy cavalry unit. It replaces the Knight and is unlocked with Divine Right if Basil is the leader. The Tagma hast the same Combat strength and Movement as the Knight, but it grants a 4 strength (combat or religious) bonus to nearby land units
Research
Cost
Maintenance
Upgrades to
Resources needed
Strength
Moves
Divine Right
220 or 440 or 880
4
Cuirassier (150 cost)
10 Iron
48
Additional information
Strategy
Having the same stats as the unit they replace, the Knight, the Tagma are far superior and more versatile. They can be used in times of war to boost themselves or other military units (bonus Combat Strength does not stack), making it easy to wipe other Civilizations. They can also be used in times of peace or against ally civilizations, supporting religious units in their combats.
Byzantium's unique district, it replaces the Entertainment Complex. The Hippodrome provides 3 Amenities from entertainment (instead of 1) and most importantly, when constructed the district provides a Heavy Cavalry unit free of maintenance and then another one for each building constructed in the district.
Civic requirement
Replaces
Base Cost
Pillage Yield
Location requirements
Games and recreation
Entertainment Complex
27
1
25
Cannot be built if Water Park has already been built in this city
Byzantine unique naval ranged unit. It replaces the Quadrireme. In comparison, the Dromon has +1 Range and +10 Ranged Strength against land and naval units
Melee Strength
Ranged Strength
Sight
Shipbuilding
120 or 240 or 480
2
Frigate (130 cost)
None
20
3
Because of this unit Byzantium early game is stronger in water maps. Despite being a naval unit, Dromons are used to give your religious spread a quick-start, this is because defeating enemy units makes it so Bizantium's religion is spread to nearby cities (Civ ability - Taxis). Early game settle a city on the coast and declare war on a neighbor that has units and cities on the coast too.
No start bias.
Byzantium's best type of victories are Domination and Religious.
Domination is one of the most suitable paths for Byzantium. Although if you're doing things the right way, you might 'accidentally' get a religious victory while going for domination. This is due to Byzantium's civ ability, Taxis, which makes it so the civ's religion is spread to nearby cities when an enemy unit is defeated.
Byzantium led by Basil II (as of now the civ's only leader) has 2 unique units. The Dromon and the Tagma, boosting military might in the Classical and Medieval eras respectively. The only problem for Byzantium is that there are no bonuses/incentives in terms of gold generation. To make up for this, the Hippodrome grants you Heavy Calvary free of maintenance once it or a building in it is constructed.
Not the best path for the Byzantine empire. Receiving no bonuses in terms of science the best way of getting this type of victory is by going full domination, and then winning by simply having an overwhelming number of cities and (captured) campuses.
Again, not a good path for Byzantium, the civilization has no bonuses or incentives in terms of Culture. However, it isn't too difficult of a victory. Achieve it through war.
Byzantium has a huge advantage when it is trying to achieve a religious victory. Bonuses and incentives towards religious combat and religious spread favor the Byzantine Empire. Taxis, the civilization ability, grants additional Religious strength, spreading to nearby cities and makes it easier to get a Great Prophet from Holy Sites. Porphyrogénnētos, Basil's leader ability, makes it so your cavalry deal full damage to cities that follow the same religion as the Byzantine empire. Domination and religion go hand in hand.
Making allies isn't natural for the Byzantine Empire, other leaders get mad when you convert their cities or wage war against them. However, diplomacy is more about the player's knowledge than the civilization itself. Knowing what the AI is going to vote for requires experience in the game.
The Byzantine Empire benefits a lot from having the Sanguine Pact as friends. Vampires will help in times of war, which should be almost all the time if you're playing this civilization.
The Voidsingers are second place, they favor religious civilizations, but particularly those that have Faith bonuses, which Byzantium has not, also in this case religious victory synergices with war anyways, making the Sanguine Pact the better choice. However, if luck is not with you and you don't get to meet the Sanguine Pact, then the Voidsingers are still a good choice.
Promotion title
Unlocked by
Effect
Reach the Medieval Era
Grants a Vampire unit in your capital, and allows your Vampires to construct Vampire Castles (maximum two per empire).
Reach the Industrial Era
Grants a Vampires unit in your capital. Increases maximum Vampire Castle build to three. Your vampires now intimidate adjacent enemy units, reducing their combat strength by 5. Pillaging now costs Vampires 1 movement.
Reach the Atomic Era
Grants a Vampire unit in your capital. Increase maximum Vampire Castle builds to four. Units can teleport between Vampire Castles.
The Vampire benefits a lot from Tagma bonuses (+4 Combat Strength to nearby land units). However, vampires are slow and you will find a lot of times that they are late to battles. Plan ahead and build Vampire Castles later in the game.
Unlike other civilizations that see benefit in ignoring religion while playing on higher difficulties, Byzantium needs to found one as soon as possible. In order to do this the Astrology's eureka is needed, discover a Natural wonder. A good build order is Scout>Slinger>Slinger or Scour>Scour>Slinger. The idea is to Scout enough so once the time to research Astrology comes, the technology is already boosted.
Religion, pantheon and beliefs:
After the Classical era starts you should be one of the firsts to found a religion. Good beliefs to choose are:
Sorry about the mouse over. We want to choose beliefs that will help us in both war and religious efforts. There are other good choices, but I find that these work pretty well:
Science: Have 1 good Campus early game
Having a good Campus is important even if you're not playing a science civilization. After constructing a Holy Site and having ~3 cities you should be looking for a good place for a Campus. Mountains and Geothermal Fissures are the best. Build the Campus in the city (not necessarily the capital) that has a good spot for it and can do it in a reasonable amount of time.
Conquering the first enemy civilization and its Holy City
Once Byzantium has founded a religion it's time to play aggressively. Denounce an enemy civilization and declare war on them. Follow these steps:
1) Position your units in between your cities and theirs, let them come to you
2) Kill enough units so the enemy city converts to your religion (Taxis ability)
3) Attack the city with your Cavalry, which ignores city-defenses (Basil's ability)
4) Repeat until you reach the capital
The capital is very likely a Holy City, and therefore harder to convert. If the enemy civilization doesn't have units you will find that rebelious cities are quite helpful:
In this case, you simply let Ziz rebel and then kill the barbarian units. Until Tyre follows Kitten, or whatever is your religion.
5) Profit
6) Repeat throughout the game, in the Medieval era having access to Tagma conquering cities will be even easier. To be honest Byzantium is overpowered.
Strategy: Siege has never been so useless, as long as the enemy city follows Bizantium's religion. This is achieved by killing nearby units, thanks to the civ ability (Taxis) a city can be converted into your religion by pure force.
Tagma is a heavy cavalry that is great both at supporting and attacking. Its +4 Combat strength bonus applies to all nearby land units, including religious units. Because of this the Tagma can be used to help religious units in times of peace.
In times of war the Tagma is extremely good at conquering cities if they follow the same religion as Byzantium. It is good to bring missionaries and apostles in order to convert cities before attacking. However, it is rarely necessary because of Taxis, if you kill enough units nearby, eventually cities will get converted.
Maintenance cost is high (4), keep that in mind before making them. However, maintenance cost is 0 if you get them from Hippodromes.
Note: Tagma combat bonus does not stack, having 1 or 2 Tagma is enough.
Note 2: As of release date Tagma is bugged, they disappear and reappear later in the game. No, you're not imagining it.
If the civilization is played as is intended, domination route, eventually Byzantium will have all districts from captured cities. Nevertheless early game Holy Sites and 1 good Campus are enough to steer the game in your favor.
Holy Sites are the most important district while playing as Byzantium. Constructing the first one early enough to found a religion is necessary, and then having more throughout the game will help greatly in war and religious efforts. Especially if the God of War pantheon is chosen.
Constructing at least 1 good Campus (3+ adjacency bonus) early game is enough to not fall behind in science (higher difficulties). Afterwards, conquering cities that have Campuses in them is good enough.
Encampments are important, but you don't really need them early game. Prioritize Holy Sites, Campus (at least 1) and Hippodromes
Want free Heavy Cavalry that has no maintenance cost?
Construct a lot of Hippodromes, not only it will provide amenities for your cities in war, but also it will grant a Heavy Cavalry unit once constructed and then again for each building.
Don't let Byzantium convert your cities, and in the case you see them doing it, then prepare for war: