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Orthodoxy was a technology in Age of Empires II HD: The Forgotten that was unique to the Slavs and can be researched at the Castle. Once researched, it gave Monks +3/+3 armor.

It was removed in update 61321 for the Definitive Edition, being replaced with Detinets.


Slavs have almost all Monastery technologies, lacking only Heresy, so Slavic Monks are above average. With Orthodoxy, the Slavs had one of the best and most durable Monks in the game, as Orthodoxy gave them armor so they could support the front lines and resist enemy attacks. That is important because three of the core units of the Slavic army are melee units (Champion, Boyar, and Halberdier) and in many cases they require the support of Monks to become more durable in battle.

The major benefit of Orthodoxy was the better performance against ranged units, the major counter of Monks, which results in, for example, 12 hits from Crossbowmen and 22 hits from Elite Skirmishers being needed to kill them in the Castle Age once Sanctity has been researched, up from 7 and 9 hits, respectively. On a similar note, when engaging with Hussars; even Monks with Sanctity researched will die in two hits from a fully upgraded Hussar, while Slavic Monks require three hits if they have Orthodoxy. That gave Slavic Monks an important improvement against the common Monk counters.

Furthermore, due to being already available in the Castle Age, Orthodoxy was a superb support for a Monk rush strategy, adding to the Slav's cheaper siege and great economic bonuses, which allowed them to quickly organize their economy around wood and gold to provide the siege, Monks and technologies, with fewer Villagers needed on farms to keep producing Villagers, Knights and/or infantry if desired.


AoE2Icon-DynastiesIndia Dynasties of India[]


Orthodoxy is the form of Christianity maintained by the Greek Orthodox Church and the countries evangelized from it.[1] Christianity was first introduced to East Slavic State of Kievan Rus by Greek missionaries in the 9th century. Eventually, Christianity became the official state religion of Kievan Rus after its prince, Vladimir, was baptized in 988.[2]


  • With update 66692, Bengalis get a new civilization bonus with the same effect of Orthodoxy. It was replaced because getting the advantage of the extra armor on Monks came too late, as a Castle was needed, and the player also needed to invest resources on the technology.


  2. Encyclopædia Britannica Ultimate Reference Suite. 2008. "Russian Orthodox church". Chicago: Encyclopædia Britannica.
Unique technologies in Age of Empires II
AoE2-DLCicon-0 The Age of Kings civilizations
UniqueTechCastle-DEBritons AoE2 Yeomen · Byzantines AoE2 Greek Fire · Celts AoE2 Stronghold · Chinese AoE2 Great Wall · Franks AoE2 Bearded Axe · Goths AoE2 Anarchy · Japanese AoE2 Yasama · Mongols AoE2 Nomads · Persians AoE2 Kamandaran · Saracens AoE2 Bimaristan · Teutons AoE2 Ironclad · Turks AoE2 Sipahi · Vikings AoE2 Chieftains
UniqueTechImperialDEBritons AoE2 Warwolf · Byzantines AoE2 Logistica · Celts AoE2 Furor Celtica · Chinese AoE2 Rocketry · Franks AoE2 Chivalry · Goths AoE2 Perfusion · Japanese AoE2 Kataparuto · Mongols AoE2 Drill · Persians AoE2 Citadels · Saracens AoE2 Counterweights · Teutons AoE2 Crenellations · Turks AoE2 Artillery · Vikings AoE2 Bogsveigar
AoE2-DLCicon-1 The Conquerors civilizations
UniqueTechCastle-DEAztecs AoE2 Atlatl · Huns AoE2 Marauders · Koreans AoE2 Eupseong · Mayans AoE2 Hul'che Javelineers · Spanish AoE2 Inquisition
UniqueTechImperialDEAztecs AoE2 Garland Wars · Huns AoE2 Atheism · Koreans AoE2 Shinkichon · Mayans AoE2 El Dorado · Spanish AoE2 Supremacy
AoE2-DLCicon-2 The Forgotten civilizations
UniqueTechCastle-DEIncas AoE2 Andean Sling · Italians AoE2 Pavise · Magyars AoE2 Corvinian Army · Slavs AoE2 Detinets
UniqueTechImperialDEIncas AoE2 Fabric Shields · Italians AoE2 Silk Road · Magyars AoE2 Recurve Bow · Slavs AoE2 Druzhina
AoE2-DLCicon-3 The African Kingdoms civilizations
UniqueTechCastle-DEBerbers AoE2 Kasbah · Ethiopians AoE2 Tigui · Malians AoE2 Royal Heirs · Portuguese AoE2 Carrack
UniqueTechImperialDEBerbers AoE2 Maghrebi Camels · Ethiopians AoE2 Farimba · Malians AoE2 Torsion Engines · Portuguese AoE2 Arquebus
AoE2-DLCicon-4 Rise of the Rajas civilizations
UniqueTechCastle-DEBurmese AoE2 Manipur Cavalry · Khmer AoE2 Tusk Swords · Malay AoE2 Thalassocracy · Vietnamese AoE2 Chatras
UniqueTechImperialDEBurmese AoE2 Howdah · Khmer AoE2 Double Crossbow · Malay AoE2 Forced Levy · Vietnamese AoE2 Paper Money
AoE2-DLCicon-5 The Last Khans civilizations
UniqueTechCastle-DEBulgarians AoE2 Stirrups · Cumans AoE2 Steppe Husbandry · Lithuanians AoE2 Hill Forts · Tatars AoE2 Silk Armor
UniqueTechImperialDEBulgarians AoE2 Bagains · Cumans AoE2 Cuman Mercenaries · Lithuanians AoE2 Tower Shields · Tatars AoE2 Timurid Siegecraft
AoE2Icon-LordsWest Lords of the West civilizations
UniqueTechCastle-DEBurgundians AoE2 Burgundian Vineyards · Sicilians AoE2 First Crusade
UniqueTechImperialDEBurgundians AoE2 Flemish Revolution · Sicilians AoE2 Hauberk
Dawn of the Dukes icon Dawn of the Dukes civilizations
UniqueTechCastle-DEBohemians AoE2 Wagenburg Tactics · Poles AoE2 Szlachta Privileges
UniqueTechImperialDEBohemians AoE2 Hussite Reforms · Poles AoE2 Lechitic Legacy
AoE2Icon-DynastiesIndia Dynasties of India civilizations
UniqueTechCastle-DEBengalis AoE2 Paiks · Dravidians AoE2 Medical Corps · Gurjaras AoE2 Kshatriyas · Hindustanis AoE2 Grand Trunk Road
UniqueTechImperialDEBengalis AoE2 Mahayana · Dravidians AoE2 Wootz Steel · Gurjaras AoE2 Frontier Guards · Hindustanis AoE2 Shatagni
AoE2Icon-ReturnRome Return of Rome civilizations
UniqueTechCastle-DERomans AoE2 Ballistas
UniqueTechImperialDERomans AoE2 Comitatenses
AoE2Icon-MountainRoyals The Mountain Royals civilizations
UniqueTechCastle-DEArmenians AoE2 Cilician Fleet · Georgians AoE2 Svan Towers
UniqueTechImperialDEArmenians AoE2 Fereters · Georgians AoE2 Aznauri Cavalry
Removed technologies
UniqueTechCastle-DEPersians AoE2 Boiling Oil · Saracens AoE2 Camelry · Saracens AoE2 Madrasah · Mayans AoE2 Obsidian Arrows · Slavs AoE2 Orthodoxy · Koreans AoE2 Panokseon
UniqueTechImperialDEVikings AoE2 Berserkergang · Persians AoE2 Mahouts · Sicilians AoE2 Scutage · Saracens AoE2 Zealotry
Revised technologies
UniqueTechImperialDE Couriers · UniqueTechImperialDE Manipur Cavalry · UniqueTechImperialDE Paper Money · UniqueTechCastle-DE Royal Heirs