Introduced in C4w
Unique Building for Celtic Empire (Replaces Walls)
Cost[1]50 Hammer
Special Abilities
  • Free Guerilla I Promotion for Units Built in this City
  • 50% Defense (Except vs. Gunpowder-based Units)
  • -25% Damage to Defenses from Bombardment
    (Except vs. Gunpowder-based Units) (only in C4w)</ref>
  • -50% Damage to Defenses from Bombardment
    (Except vs. Gunpowder-based Units) (only in C4bts)
  • Required to Build Castle
  • Double production speed for Protective leaders[2]
  • Double Production Speed with Stone
Obsolete with Rifling (Except defensive bonus)



""Dun" is a Celtic word meaning, "hill-fort." The Celts began constructing duns around the seventh century BC, and remnants can be found scattered across Western Europe, England, Scotland and Ireland. Duns were typically small, squat towers constructed of dry-laid stone on raised, defensible terrain such as hills and promontories. Some were surrounded by ditches or artificial lakes.

While many hill-forts were primitive and quite small, more extensive and complex Celtic duns have also been discovered. One such example is "Dun Carloway," on the Isle of Lewis, Scotland. This double-walled castle-like structure originally stood some thirteen meters high and fourteen meters in diameter. Maiden Castle in Dorset, England, is an extensive wall and ditch work surmounting a large hill some 47 acres in size."


"Duns, the Celtic replacements for Walls, increase a city's defenses against pre-gunpowder units, and gives all eligible units built in this city the Guerrilla I promotion."

Difference from Walls

It gives free Guerilla I promotion to any unit built in its city.


In the city screen press the following icon to start Dun construction:

Game versionButton
C4w and C4btsIcoDun

See also

List of City Buildings


  1. Cost depends on Game Speed. Quick: 33 Hammer, Epic: 75 Hammer, Marathon: 150 Hammer.
  2. This special ability affects in C4w and C4bts, but appears only in C4bts.