The United Imperium at it's height consisted of Cognito, Lac Glacei and Free Cyberia. The Imperium also at various times held protectorates over Jaris, Rulczentia, Absentia], Cocoanut Grove and assorted unpopulated islands.
- Jacobus I
- Mik'el Tzion (regency)
- Jacobus I (restored)
- Grand Duke Theo (regency)
- JacobusI (restored)
- Joseph I (Joe Whitt - named Shireroth to be his heir and abdicated)
- Jacobus II (exile)
- Jacobus I (exile)
- Ergo Sum, Cognito (Summer capital)
- Lac Glacei City (Winter capital)
- Southaven, Lasteria, I.D.F.C.(War capital)
Once considered defunct by many, were always rumors of an attempt at resoration. Emperor Jacobus took possesion of Cognito & Lac Glacei in October of 2006. The restoration feared by some never came to pass. It seemed likely that the former Imperium heartland wil be absorbed by the Federal Republic of Cyberia, and this has since come to pass.