🪓 Buildings

Standard vs. Simple

Season 1 offers two building systems. Lords can switch between standard and simple building modes at any time by clicking the toggle at the top of the construction tab.

Simple Mode Production

Note: Some buildings only require food to construct. Farms, Fishing Villages and Resource Buildings have the same construction cost in both standard and simple building modes.

Standard Mode

This is the classic Eternum experience. Construction requires a combination of labor and a particular set of resources as building materials. Standard mode is more complex as it involves a greater number of materials in storage, however it is far more efficient overall. This building mode is generally designed for those with multiple Realms and/or Villages working with economies of scale.

Simple Mode

This mode allows players to utilize Labor, a new material for Season 1, as the singular input for construction. Simple mode greatly improves accessibility and simplifies gameplay overall, but is much less efficient in both time and materials. This would be the preferred system for players with smaller holdings and limited access to a variety of resources.

Placement & Population

Placement

The construction tab can be accessed in the Local view. Buildings can be constructed on any buildable hex of a Realm or Village, provided the owner has the requisite materials and population capacity. Buildable hexes are defined by the upgrade level (i.e. Settlement, City, Kingdom, or Empire) and are visible as hexes with patches of bare, prepared earth. Most buildings can be constructed in either simple or standard mode, which toggled at the top of the construction tab.

Building Placement

Population

Population is the total population utilised by the currently constructed production buildings on a Realm or Village, while the population capacity is the maximum available population with which to construct production buildings. Worker Huts can be built to increase population capacity, while all other buildings require population capacity to be available in order to construct. Lords must balance their construction to ensure there is enough population capacity available to construct their desired production buildings.

Building Types

The Keep

Settling any Realm or Village will automatically construct a structure in the centre of your buildable hexes, known as the Keep. This structure represents your seat of power and the central point of governance, and facilitates key functions such as Realm/Village upgrades and Labor production. This building cannot be destroyed and provides a baseline population capacity of 5.

Labor Camp

ID: 25

Pop Cap: +5

Produces Labor resource
Provides a baseline population capacity of 5
Available in both simple and standard building modes

Resource Buildings

There is a specific resource building for each of the 22 resources in the game, so Lords will require separate resource buildings if they wish to produce more than one type of resource. These buildings only require food to construct and have the same requirements in simple and standard mode.

Lumber Camp

ID: 5

Pop Req: 2

Produces Wood resource
Requires 2 population to be constructed
Same construction cost in both simple and standard modes

Building Costs

750,000

Stone Quarry

ID: 3

Pop Req: 2

Produces Stone resource
Requires 2 population to be constructed
Same construction cost in both simple and standard modes

Building Costs

750,000

Coal Mine

ID: 4

Pop Req: 2

Produces Coal resource
Requires 2 population to be constructed
Same construction cost in both simple and standard modes

Building Costs

750,000

Copper Mine

ID: 6

Pop Req: 2

Produces Copper resource
Requires 2 population to be constructed
Same construction cost in both simple and standard modes

Building Costs

750,000

Obsidian Flows

ID: 8

Pop Req: 2

Produces Obsidian resource
Requires 2 population to be constructed
Same construction cost in both simple and standard modes

Building Costs

750,000

Silver Mine

ID: 10

Pop Req: 2

Produces Silver resource
Requires 2 population to be constructed
Same construction cost in both simple and standard modes

Building Costs

750,000

Ironwood Grove

ID: 7

Pop Req: 2

Produces Ironwood resource
Requires 2 population to be constructed
Same construction cost in both simple and standard modes

Building Costs

750,000

Cold Iron Foundry

ID: 13

Pop Req: 2

Produces Cold Iron resource
Requires 2 population to be constructed
Same construction cost in both simple and standard modes

Building Costs

750,000

Gold Mine

ID: 9

Pop Req: 2

Produces Gold resource
Requires 2 population to be constructed
Same construction cost in both simple and standard modes

Building Costs

750,000

Hartwood Sanctuary

ID: 17

Pop Req: 2

Produces Hartwood resource
Requires 2 population to be constructed
Same construction cost in both simple and standard modes

Building Costs

750,000

Diamond Mine

ID: 16

Pop Req: 2

Produces Diamond resource
Requires 2 population to be constructed
Same construction cost in both simple and standard modes

Building Costs

750,000

Sapphire Mine

ID: 22

Pop Req: 2

Produces Sapphire resource
Requires 2 population to be constructed
Same construction cost in both simple and standard modes

Building Costs

750,000

Ruby Mine

ID: 15

Pop Req: 2

Produces Ruby resource
Requires 2 population to be constructed
Same construction cost in both simple and standard modes

Building Costs

750,000

Deep Crystal Cave

ID: 14

Pop Req: 2

Produces Deep Crystal resource
Requires 2 population to be constructed
Same construction cost in both simple and standard modes

Building Costs

750,000

Ignium Harvester

ID: 18

Pop Req: 2

Produces Ignium resource
Requires 2 population to be constructed
Same construction cost in both simple and standard modes

Building Costs

750,000

Ethereal Silica Harvester

ID: 23

Pop Req: 2

Produces Ethereal Silica resource
Requires 2 population to be constructed
Same construction cost in both simple and standard modes

Building Costs

750,000

True Ice Harvester

ID: 20

Pop Req: 2

Produces True Ice resource
Requires 2 population to be constructed
Same construction cost in both simple and standard modes

Building Costs

750,000

Twilight Quartz Mine

ID: 19

Pop Req: 2

Produces Twilight Quartz resource
Requires 2 population to be constructed
Same construction cost in both simple and standard modes

Building Costs

750,000

Alchemical Workshop

ID: 12

Pop Req: 2

Produces Alchemical Silver resource
Requires 2 population to be constructed
Same construction cost in both simple and standard modes

Building Costs

750,000

Adamantine Mine

ID: 21

Pop Req: 2

Produces Adamantine resource
Requires 2 population to be constructed
Same construction cost in both simple and standard modes

Building Costs

750,000

Mithral Forge

ID: 11

Pop Req: 2

Produces Mithral resource
Requires 2 population to be constructed
Same construction cost in both simple and standard modes

Building Costs

750,000

Dragonhide Harvester

ID: 24

Pop Req: 2

Produces Dragonhide resource
Requires 2 population to be constructed
Same construction cost in both simple and standard modes

Building Costs

750,000

Economic Buildings

These buildings define the utility of a Realm or Village, including food production, donkey production, population capacity, and storage capacity. All of these buildings can be constructed in either standard or simple mode, but have varying costs and population requirements:

[economic building table, including population cost / population capacity increase (Worker Hut) / storage capacity increase (Storehouse)]

Worker's Hut

ID: 1

Pop Cap: +5

Increases population capacity by 5
Available in both simple and standard building modes

Building Costs

Simple

250,000

Standard

25,000

50,000

25,000

Storehouse

ID: 2

Pop Req: 2

Increases storage capacity by 300,000 kg for each material
Requires 2 population to be constructed
Available in both simple and standard building modes

Building Costs

Simple

300,000

Standard

25,000

50,000

10,000

5,000

Market

ID: 27

Pop Req: 3

Produces Donkeys for transportation
Requires 3 population to be constructed
Available in both simple and standard building modes

Building Costs

Simple

600,000

Standard

50,000

25,000

5,000

Farm

ID: 37

Pop Req: 1

Produces Wheat (food) resource
Requires 1 population to be constructed
Same construction cost in both simple and standard modes

Building Costs

500,000

Fishing Village

ID: 38

Pop Req: 1

Produces Fish (food) resource
Requires 1 population to be constructed
Same construction cost in both simple and standard modes

Building Costs

500,000

Military Buildings

Your military buildings are essential for training up armies to defend your territories and project your might. There are three 'tiers' of each of the three troop types, but a different building is required to produce each troop tier. As such, there are a total of 9 military buildings in the game.

Note: Only T1 troop buildings can be constructed in both standard and simple mode. T2 and T3 military buildings are only available for construction in standard mode.

Footman Barracks (T1)

ID: 28

Pop Req: 3

Produces T1 Footman units
Requires 3 population to be constructed
Available in both simple and standard building modes

Building Costs

Simple

560,000

Standard

75,000

25,000

50,000

25,000

Knight Quarters (T2)

ID: 29

Pop Req: 3

Produces T2 Knight units
Requires 3 population to be constructed
Only available in standard building mode

Building Costs

Standard Only

250,000

100,000

75,000

50,000

Guardian Sanctum (T3)

ID: 30

Pop Req: 3

Produces T3 Royal Guardian units
Requires 3 population to be constructed
Only available in standard building mode

Building Costs

Standard Only

750,000

500,000

250,000

100,000

50,000

Archery Range (T1)

ID: 31

Pop Req: 3

Produces T1 Archer units
Requires 3 population to be constructed
Available in both simple and standard building modes

Building Costs

Simple

590,000

Standard

75,000

25,000

50,000

25,000

Crossbow Garrison (T2)

ID: 32

Pop Req: 3

Produces T2 Crossbowman units
Requires 3 population to be constructed
Only available in standard building mode

Building Costs

Standard Only

250,000

100,000

75,000

50,000

Hunting Den (T3)

ID: 33

Pop Req: 3

Produces T3 Beast Hunter units
Requires 3 population to be constructed
Only available in standard building mode

Building Costs

Standard Only

750,000

500,000

250,000

100,000

50,000

Horseman Stables (T1)

ID: 34

Pop Req: 3

Produces T1 Horseman units
Requires 3 population to be constructed
Available in both simple and standard building modes

Building Costs

Simple

590,000

Standard

75,000

50,000

25,000

Paladin Sanctuary (T2)

ID: 35

Pop Req: 3

Produces T2 Paladin units
Requires 3 population to be constructed
Only available in standard building mode

Building Costs

Standard Only

250,000

100,000

75,000

50,000

Dragon Pit (T3)

ID: 36

Pop Req: 3

Produces T3 Dragon Rider units
Requires 3 population to be constructed
Only available in standard building mode

Building Costs

Standard Only

750,000

500,000

250,000

100,000

50,000

Same Building Cost Increase

Building multiple buildings of the same type will cost progressively more each time. The cost increase is calculated using the following formula:

Cost = Base Cost + (Base Cost × 0.5 × (N-1)²)

Where:

Base Cost is the initial cost of the building (from the tables above)
N is the number of the same buildings already constructed

For example, if you build a second building of the same type (N=2), the cost will be:

Cost = Base Cost + (Base Cost × 0.5 × (2-1)²)
     = Base Cost + (Base Cost × 0.5 × 1)
     = Base Cost × 1.5

Note: Buildings need to be exactly the same type for this rule to apply. For example, building a Stone Quarry after a Lumber Camp (both being resource buildings) would not be subject to this cost increase.