|This article is about the technology in Age of Empires II. For the technology in Age of Mythology, see Crenellations (Age of Mythology).|
|Introduced in||The Conquerors|
|Research Time||60 seconds|
|Effect||Castle range +3, garrisoned infantry fires arrows|
Crenellations is a technology in Age of Empires II: The Conquerors that is unique to the Teutons and can be researched at the Castle once the Imperial Age is reached. Once researched, it increases Castle range by +3, and any garrisoned infantry can shoot arrows.
Normally, only archer-type units and Villagers provide additional arrows to a Tower's, Town Center's, or Castle's attack while common infantry don't. Crenellations gives a Teutonic player an edge by circumventing this, allowing any garrisoned infantry to contribute to a Tower/Castle/Town Center's defense. Bombard Towers, however, do not benefit from Crenellations like normal Towers since their strict garrison bonus only applies if gunpowder units are present.
This becomes valuable if the player's army is routed and is on a retreat, and there are auxiliary Castles and Towers near the enemy base, as they can hide in them to heal while also bolstering the structures' defensive capabilities.
"The Teutons carried their crusade mainly into Eastern Europe while others groups vied for the Holy Land. The Teutons became especially adept at the art of building and using castles offensively to establish political control of the countryside. A few knights and soldiers in a dominating castle could control the countryside for miles."—The Conquerors manual
|Age of Empires II Unique Technologies|
|Garland Wars | Yeomen | Logistica | Furor Celtica | Rocketry | Bearded Axe | Anarchy | Perfusion | Atheism | Kataparuto | Shinkichon | El Dorado | Drill | Mahouts | Zealotry | Supremacy | Crenellations | Artillery | Berserkergang|
|Atlatl | Warwolf | Greek Fire | Stronghold | Great Wall | Chivalry | Marauders | Andean Sling | Couriers | Sultans | Shatagni | Pavise | Silk Road | Yasama | Panokseon | Mercenaries | Recurve Bow | Obsidian Arrows | Nomads | Boiling Oil | Madrasah | Orthodoxy | Druzhina | Inquisition | Ironclad | Sipahi | Chieftains|
|The African Kingdoms|
|Kasbah | Maghrabi Camels | Tigui | Farimba | Royal Heirs | Torsion Engines | Carrack | Arquebus|
|Rise of the Rajas|
|Howdah | Manipur Cavalry | Tusk Swords | Double Crossbow | Thalassocracy | Forced Levy | Chatras | Paper Money|