Board Thread:Lore Discussion/@comment-209.7.3.188-20160303204000/@comment-1600847-20161024193620

While it's usually just called "The Empire", I view it as four Empires based on the dynasty that ruled it, and that there's always a period of several decades in between each dynasty where no one or several groups claim the crown. Aka an interregnum period.

1-The Alessian Empire, ruled by Alessia then by her Alessian cult/order.

2-The Reman Empire, ruled by the Reman dynasty.

3-The Septim Empire, ruled by the Septim dysasty.

4-The Mede Empire, ruled by the Mede dysnasty.

Bethesda's been mum on the subject though, so it's just speculation.