Emperor

This title of Emperor has applied to either the rulers of the Septim Dynasty (also known as the Third Empire), or the dynasty founded by Reman Cyrodiil (also known as the Second Empire), who ruled over much of Cyrodiil and most of Tamriel during the Second Era, along with his successors. The Emperor is assisted in governing the Empire by the Elder Council. Since the reign of Tiber Septim, the Blades, a faction of knights, served as the protectors of the Emperor and his or her heirs. After Martin Septim cast Mehrunes Dagon back to Oblivion, the Septim Dynasty came to an end and so did the Blades service to the Emperors come to an end.

Ascension
Emperors ascend to the throne through bloodlines. The title is usually handed from father to son, upon the death of the former. The title has been handed to dowagers of Emperors, most notably Katariah. In the absence of an heir, the Elder Council rules in the Emperor's place until a suitable alternative can be crowned.

The Fourth Era
After the death of the last Septim, the Elder Council struggled to maintain peace in Cyrodiil, placing new Emperors on the throne -- none of which were well-taken by the people of the Empire. Eventually a Colovian warlord named Titus Mede conquered the Imperial City with just a thousand men and crowned himself Emperor. Thus began the Mede Dynasty.

Previous Emperors
The following is a list of Emperors who have ruled The Empire of Tamriel and their respective reigns.

Reman Dynasty

 * Reman Cyrodiil (Worshiped as the God Reman ) - (1E 2703 - 1E 2762)
 * Brazollus Dor - (1E 2762 - 1E ?)
 * Kastav - (1E ? - 1E 2805/2806)
 * Reman Cyrodiil II - (1E 2812 - 1E 2851)
 * Reman Cyrodiil III - (1E 2877 - 1E 2920)

Septim Dynasty

 * Tiber Septim (born Hjalti Early-Beard, worshipped as the god Talos ) - (2E 896 - 3E 38)
 * Pelagius Septim - (3E 38 - 3E 41)
 * Kintyra I - (3E 41 - 3E 53)
 * Uriel Septim I - (3E 53 - 3E 64)
 * Uriel Septim II - (3E 64 - 3E 82)
 * Pelagius Septim II - (3E 82 - 3E 99)
 * Antiochus - (3E 99 - 3E 119)
 * Kintyra Septim II - (3E 120 - 3E 121)
 * Uriel Septim III - (3E 121 - 3E 127)
 * Cephorus I - (3E 127 - 3E 140)
 * Magnus Septim - (3E 140 - 3E 145)
 * Pelagius Septim III - (3E 145 - 3E 153)
 * Katariah I - (3E 153 - 3E 199)
 * Cassynder Septim - (3E 199 - 3E 201)
 * Uriel Septim IV - (3E 201 - 3E 246)
 * Cephorus Septim II - (3E 246 - 3E 268)
 * Uriel Septim V - (3E 268 - 3E 290)
 * Uriel Septim VI - (3E 290 - 3E 317))
 * Morihatha Septim - (3E 317 - 3E 339)
 * Pelagius Septim IV - (3E 339 - 3E 368)
 * Uriel Septim VII - (3E 368 - 3E 433)
 * Martin Septim - (3E 433 - 3E 433)

Mede Dynasty

 * Titus Mede I - (4E 17 - 4E ?)
 * Attrebus - (4E ? - 4E ?)
 * Titus Mede II - (4E 168 - 4E 201)

The Amulet of Kings
The Amulet of Kings is the Crown Jewel of the Emperors of Tamriel.

When Saint Alessia rallied the slaves against the Ayleids, Akatosh bestowed upon her the gem that would later be faceted into the Amulet of Kings. The jewel later became crucial in the crowning of Cyrodilic Emperors.

During the Septim Dynasty, newly crowned Emperors brought the amulet to the Temple of the One to light the Dragonfires and keep the barrier between Tamriel and Oblivion shut. Martin Septim, an illegitimate heir, broke the tradition when he destroyed the amulet to invoke Akatosh and return Mehrunes Dagon to Oblivion, thus sealing the barrier between Oblivion and Tamriel forever.

Other royalty

 * King
 * Jarl
 * High King