In the Vinony graph
Vinony's link graph records 6 inbound references to Imperium, and connects out to Roman Empire, Holy Roman Empire and empire.
Vinony links it to 15 Wikipedia language editions.
Connections
Roman Empire
Entity
Holy Roman Empire
Entity
empire
Entity
Roman emperor
Entity
Warhammer 40,000
Entity
imperator
Entity
imperium
Entity
Empire
Entity
Imperium
Entity
Götz Spielmann
Entity
Traveller
Entity
Through the Ashes of Empires
Entity
Imperium
Entity
Imperium Galactica II: Alliances
Entity
Imperium
Entity
Imperium
Entity
Imperium Galactica
Entity
Worlds of the Imperium
Entity
Imperium
Entity
Imperium
Entity