A Mine of Unknown Origin

“	Not a real mine, but it trickles coin.	”
—In-game description

“	Generates a passive income of Fool's Gold over time. Can only be constructed by the Unknown Miner.	”
—In-game description

The A Mine of Unknown Origin is a building in Age of Empires III: Definitive Edition that only available on the random Unknown map. It generates coin over time and can only be built by the Unknown Miner.

Gallery[]

v • d • e Buildings in Age of Empires III
Common
Dock · House · Livestock Pen · Market · Native Embassy · Stable · Town Center · Trading Post · Wall
Europeans	Arsenal · Artillery Foundry · Barracks · Capitol · Church · Estate (formerly Plantation) · Fort · Mill · Outpost · Tavern
Native Americans	Community Plaza · Corral · Estate (formerly Plantation) · Farm · Tribal Marketplace · War Hut · Fire Pit (removed)
Asians	Barracks · Castle · Consulate · Monastery · Rice Paddy · Wonder
Federal Americans	Arsenal · Artillery Foundry · Barracks · Capitol · Estate · Fort · Mill · Outpost · Saloon
Africans	Arsenal · Field · Granary · Hut · Livestock Market · Palace · Port · War Camp · Watch Tower
Unique
British	Manor House
Dutch	Bank
Germans	Mercenary Camp
Ottomans	Mosque
Russians	Blockhouse
Aztecs	Nobles' Hut
Haudenosaunee	Longhouse · Siege Workshop
Lakota	Teepee
Chinese	Village · War Academy
Indians	Caravanserai · Mango Grove · Sacred Field
Japanese	Cherry Orchard · Dojo · Shrine
Inca	Kallanka · Kancha House · Stronghold · Tambo
Swedes	Torp
United States	Meeting House · State Capitol
Ethiopians	Mountain Monastery
Hausa	University
Mexicans	Cathedral · Hacienda
Italians	Basilica · Lombard
Maltese	Commandery · Depot · Fixed Gun · Hospital
Situational
American Citadel (formerly Maya Castle) · Athos Monastery · Battery Tower · Factory · Field Hospital · Regent's Castle
Scenario Editor/campaign only
A Mine of Unknown Origin · Cherokee War Hut · Command Post · Command Post · Fixed Gun · Fort Tower · Gunpowder Stores · Ossuary · The Fountain of Youth · Tower · Watch Tower