While most commonly referred to as Tiber Septim, he was also known as Hjalti Early-Beard to the Bretons of High Rock and Ysmir and Talos Stormcrown by the Nords of Skyrim. The current Empire can trace its roots back to its founder Tiber Septim, a man whose history is steeped in legend and controversy. But it was the current Empire that managed to conquer and rule over every corner of Tamriel first. There have been multiple Empires throughout history, most of which were centered in Cyrodiil. While weakened by destructive wars and crises, the Empire has managed to endure.
For most of The Elder Scrolls series, the Empire has been the dominant force of Tamriel and the world of Nirn.