Effect · every source

How to increase Fort Level in CK3

64 sources raise Fort Level and 0 lower it in the game files of patch 1.20.0.3.

fort_level

The biggest boosts

+16Hill FortsBuilding · Province
+13CastleBuilding · Province
+8Alamut CastleBuilding · Province

What raises Fort Level (64)

Buildings (63)

Hill Forts+16
Province
Levels 1–8: +2 to +16 (8 levels give it)
hill-forts · game/common/buildings/00_standard_fortification_buildings.txt
Castle+13
Province
Levels 1–4: +1 to +13 (4 levels give it)
castle · game/common/buildings/00_castle_buildings.txt
Alamut Castle+8
Province
Levels 1–2: +6 to +8 (2 levels give it)
alamut-castle · game/common/buildings/00_special_buildings.txt
Hashshashin Fortress+8
Province
assassin-castle · game/common/buildings/00_special_buildings.txt
Forest Forts+8
Province
Levels 1–8: +1 to +8 (8 levels give it)
ramparts · game/common/buildings/00_standard_fortification_buildings.txt
Walls & Towers+8
Province
Levels 1–8: +1 to +8 (8 levels give it)
curtain-walls · game/common/buildings/00_standard_fortification_buildings.txt
Watchtowers+8
Province
Levels 1–8: +1 to +8 (8 levels give it)
watchtowers · game/common/buildings/00_standard_fortification_buildings.txt
Collegiate Church of St Mary and St Alexius+8
Province
Levels 1–3: +2 to +8 (3 levels give it)
wawel-cathedral · game/common/buildings/ccp3_special_buildings.txt
Temple Citadel+8
Province
Levels 1–4: +1 to +8 (4 levels give it)
temple-citadel · game/common/buildings/temple_citadel_buildings.txt
Citadel Shrine+8
Province
Levels 1–8: +1 to +8 (8 levels give it)
citadel-shrine · game/common/buildings/temple_citadel_buildings.txt
Alhambra+6
Province
Levels 1–2: +2 to +6 (2 levels give it)
alhambra · game/common/buildings/00_special_buildings.txt
Citadel of Aleppo+6
Province
Levels 1–2: +2 to +6 (2 levels give it)
citadel-of-aleppo · game/common/buildings/00_special_buildings.txt
The Tower of London+6
Province
the-tower-of-london · game/common/buildings/00_special_buildings.txt
The Theodosian Walls+5
Province
theodosian-walls · game/common/buildings/00_special_buildings.txt
The Great Wall+5
Province
the-great-wall-04 · game/common/buildings/tgp_great_project_buildings.txt
The Great Wall+5
Province
the-great-wall-shanhai-pass · game/common/buildings/tgp_great_project_buildings.txt
The Great Wall+5
Province
the-great-wall-liaodong · game/common/buildings/tgp_great_project_buildings.txt
Legendary Watchtower+4
Province
legendary-watchtower · game/common/buildings/00_legendary_buildings.txt
Hotin Fortification+4
Province
Levels 1–2: +2 to +4 (2 levels give it)
hotin-fort · game/common/buildings/00_special_buildings.txt
Aljafería+4
Province
aljaferia-palace · game/common/buildings/00_special_buildings.txt
Alcázar of Segovia+4
Province
alcazar-of-segovia · game/common/buildings/00_special_buildings.txt
Falak-ol-Aflak+4
Province
falak-ol-aflak-citadel · game/common/buildings/00_special_buildings.txt
Ark of Bukhara+4
Province
ark-of-bukhara · game/common/buildings/00_special_buildings.txt
Kassiopi Castle+4
Province
kassiopi-castle · game/common/buildings/00_special_buildings.txt
Patras Castle+4
Province
patras-castle · game/common/buildings/00_special_buildings.txt
Citadel of Thăng Long+4
Province
Levels 1–2: +2 to +4 (2 levels give it)
citadel-thang-long · game/common/buildings/00_special_buildings.txt
Gongsanseong Fortress+4
Province
gongsanseong-fortress · game/common/buildings/00_special_buildings.txt
Idjang Forts+4
Province
Levels 1–4: +1 to +4 (4 levels give it)
idjang-forts · game/common/buildings/00_tribal_buildings.txt
Great Kyz Kala+4
Province
kyz-kala · game/common/buildings/ccp3_special_buildings.txt
Walls of York+4
Province
york-walls · game/common/buildings/ccp3_special_buildings.txt
Visegrad Citadel+4
Province
visegrad-castle · game/common/buildings/ccp3_special_buildings.txt
Golden Fort+4
Province
jaisalmer-fort · game/common/buildings/ccp3_special_buildings.txt
Mont-Saint-Michel+4
Province
Levels 2–4: +1 to +4 (3 levels give it)
mont-st-michel · game/common/buildings/cp6_special_buildings.txt
Temple Citadel+4
Province · culture with Fortified Strongholds
Levels 1–4: +1 to +4 (4 levels give it)
temple-citadel · game/common/buildings/temple_citadel_buildings.txt
Doge's Palace+3
Province
doges-palace · game/common/buildings/00_special_buildings.txt
The Aurelian Walls+3
Province
aurelian-walls · game/common/buildings/00_special_buildings.txt
Wartburg+3
Province
wartburg · game/common/buildings/ccp3_special_buildings.txt
The Great Wall+3
Province
the-great-wall-03 · game/common/buildings/tgp_great_project_buildings.txt
Walls of Genoa+2
Province
walls-of-genoa · game/common/buildings/00_special_buildings.txt
Walls of Benin+2
Province
walls-of-benin · game/common/buildings/00_special_buildings.txt
Golden Gate of Kyiv+2
Province
golden-gate-of-kiev · game/common/buildings/00_special_buildings.txt
City Walls of Toledo+2
Province
city-wall-of-toledo · game/common/buildings/00_special_buildings.txt
Maiden's Tower+2
Province
maiden-tower · game/common/buildings/00_special_buildings.txt
Saint Catherine's Monastery+2
Province
saint-catherine · game/common/buildings/00_special_buildings.txt
Cilician Gates+2
County
cilician-gates · game/common/buildings/00_special_buildings.txt
Burkhan Khaldun+2
Province
burkhan-khaldun · game/common/buildings/00_special_buildings.txt
Port of Mombasa+2
Province
swahili-port-mombasa · game/common/buildings/00_special_buildings.txt
Heian Palace+2
Province
heian-palace · game/common/buildings/00_special_buildings.txt
Dazaifu Office+2
Province
dazaifu · game/common/buildings/00_special_buildings.txt
Chinjufu District+2
Province
chinjufu · game/common/buildings/00_special_buildings.txt
Mount Baekdu+2
Province
mount-baekdu · game/common/buildings/00_special_buildings.txt
Muaro Jambi Compounds+2
Province
muaro-jambi · game/common/buildings/00_special_buildings.txt
Tribal Hold+2
Province
Levels 1–2: +1 to +2 (2 levels give it)
tribe · game/common/buildings/00_tribal_buildings.txt
Palisades+2
Province
Levels 1–2: +1 to +2 (2 levels give it)
palisades · game/common/buildings/00_tribal_buildings.txt
Kano Earthworks+2
Province
kano-walls · game/common/buildings/ccp3_special_buildings.txt
The Great Wall+2
Province
the-great-wall-02 · game/common/buildings/tgp_great_project_buildings.txt
Visby Ringmur+1
Province
visby-ringmur · game/common/buildings/00_special_buildings.txt
Roman Walls of Lugo+1
Province
roman-wall-of-lugo · game/common/buildings/00_special_buildings.txt
Rock of Gibraltar+1
Province
rock-of-gibraltar · game/common/buildings/00_special_buildings.txt
Great Wall of Gorgan+1
Province
great-wall-of-gorgan · game/common/buildings/00_special_buildings.txt
Pemba Trade Ports+1
Province
swahili-port-pemba · game/common/buildings/00_special_buildings.txt
Trosky Castle+1
Province
trosky-castle · game/common/buildings/00_special_buildings.txt
The Great Wall+1
Province
the-great-wall · game/common/buildings/tgp_great_project_buildings.txt

Laws (1)

Defense Mobilization+1
Imperial Policies · Rulers with this law
defense_mobilization_law · game/common/laws/03_imperial_policies.txt

Source: game/common/buildings/00_castle_buildings.txt, game/common/buildings/00_legendary_buildings.txt, game/common/buildings/00_special_buildings.txt, game/common/buildings/00_standard_fortification_buildings.txt, game/common/buildings/00_tribal_buildings.txt, game/common/buildings/ccp3_special_buildings.txt, game/common/buildings/cp6_special_buildings.txt, game/common/buildings/temple_citadel_buildings.txt, game/common/buildings/tgp_great_project_buildings.txt, game/common/laws/03_imperial_policies.txt and the English localisation, Crusader Kings III 1.20.0.3. Building chains are shown once, at their strongest level, with the range over their levels. Effects that come only from events or scale with a script value are not listed.