Underground Fortress

Description

This is a fortress or castle with an extensive underground network. In addition to the above-ground fortifications, it also consists of tunnels, living quarters, storerooms, and defensive chambers carved directly into the rock, designed to provide shelter and protection during sieges or invasions. Notable examples include the Château de Brézé in France, featuring vast rock-hewn corridors and defensive galleries beneath the main castle, and the Buda Castle Labyrinth in Hungary, an extensive cave system historically used for defense, storage, and even as a prison.

Core data

ID

719

Alias

ID_STRUC_UNDERGROUND_FORTRESS

$Alias

$ID_STRUC_UNDERGROUND_FORTRESS

Tier

2

Job

Military ($POP_JOB_MILITARY)

SubJob

Military ($JOB_KIND_MILITARY)

Christian available

Yes

Muslim available

Yes

TN / Tribe available

No

DisplayOrder

0

Style color

$Col_MediumRed

Design and constraints

Notable points

SR20, red Stone castle or later

DLC notes

-

Constraints

Underground Fortress

Minimum population

3

Region max buildings

1

Minimum piety

-

Minimum stewardship

-

Required area

-

Required terrain

-

Forbidden terrain

-

Type and economy

Tier

2

Is depot

No

Is fort

No

Is city structure

No

Is harbor

No

Authority gain

0

Legacy gain / turn

0

Slot usage cost

1

Infrastructure cost

120

Infrastructure upkeep

0

Money upkeep

5

Resources

Field	Value
Input_Resource	Preserved Food
BonusResource[0]	Weapons
BonusResource[1]	Armors

Outputs

Output field	Value
MBPStockpile	20
MBP_Output	5
Income_Output	-6
Steward_Output	10

Bonus outputs

Bonus field	Value
Bonus_MBP	3
Bonus_Steward	3

Building tree

Requires

Shell Keep with Stone Bailey, Stone Castle, Bastioned Castle

Upgrades to

None

Replaces

None

Forbidden with

None

Used by (reverse dependencies)

None

Military / garrison links

Garrison category

0

Units in this garrison category

No units mapped for this garrison category

Units unlocked by this structure

No units directly requiring this structure

WallValue

0

SiegeResist

20

CounterRaid

0

FT_Level

0

FT_MinLevel

0

FT_MaxLevel

100

FT_LevelChange

0

Transverse outputs (from linked modifiers)

No transverse outputs decoded from linked modifiers.

Manual references

Source: FOG_Kingdoms_Manual_Printer-Friendly.pdf

No direct manual mention found for this exact structure name.

Modifiers

Name	Alias	Description	Effects (decoded)
IDS_MOD_Name_Structure_Underground_Fortress	ID_MOD_STRUCTURE_UNDERGROUND_FORTRESS	Vast Stores	Extra Supply: 15