🇲🇳 Mongolia · Hydraulic works
Karakorum — Orkhon Valley Hydraulic and Urban Canals
Mongol Empire (Ögedei to Möngke, 1235–1260) · Mongol imperial (Ögedei, Möngke, artisans Chinese–Muslim–European)
1235 Ögedei capital's 8-km Orkhon pipe to Silver Tree fountain and 60-well moated square, Bonn–Ulaanbaatar excavated.