Primarch

A primarch is the official ruler of a turian colonisation cluster. The title was created by Aurelion Aurelos, who specified that, after his death, it was to be used not just in place of the title of Imperatrix/Imperator (meaning "Empress/Emperor") for the ruler of Palaven but also for the seven newly appointed rulers of the original seven extra-solar colonies of the empire. As turian space has continued to expand, so too has the number of primarchae. Primarch is a gender-neutral title and is applied to both male and female primarchae. When addressing a primarch directly, one is expected to call them "Domina" or "Dominus" (depending on their sex; "Domina" for females and "Dominus" for males) and never use their name unless given express permission.
In modern times, primarchae are separated into three categories: imperial, colonial and ceremonial. Colonial primarchae make up the bulk of the Council of Hierarchs, ruling over the empire's myriad extra-solar colonies. The ceremonial primarchae do not rule over anything; they instead represent the descendants of the three colonies that were lost during the Krogan Rebellions, charged with protecting their history and culture and bringing the needs of their displaced people to the attention of the council. All colonial and ceremonial primarchae answer directly to the reigning imperial primarch - the Primarch of Palaven - who rules over the empire.
The Council of Hierarchs currently consists of 38 colonial primarchae, 3 ceremonial primarchae and the Primarch of Palaven, equalling 42 members. A majority of 22 votes are needed for any laws to be passed.
== Powers ==
Barring ceremonial primarchae, each primarch has the legal jurisdiction to change the laws which govern the territories over which they rule, albeit with some exceptions. Foreign policy matters are still entirely in the Primarch of Palaven's hands. Collectively, the primarchae vote on matters of national importance and shape imperial policy. However, the Primarch of Palaven retains the right to veto any decision the Council of Hierarchs makes.
== Known primarchae ==
=== Imperial primarchae (The primarchae of Palaven) ===
* Pallix Arterius, 254-243 BCE, reigned for 11 years
* Orian Aurix, 243-236 BCE, reigned for 7 years
* Traianus Tiervian, 236-? BCE
* Aurelia Abrudas
* Aristeia Verrikan
* Traianus Ursivus, 1498-1517 CE, reigned for 19 years
* Alexia Aurelos
* Ilario Enterus
* Regnaltus Fedorian I, ?-2186 CE
* Adrien Victus, 2186-2220 CE, reigned for 34 years
* Desolas Arterius II, 2220-2227 CE, reigned for 7 years (illegally deposed and exiled by Antraxes Mehrkuri)
* Antraxes Mehrkuri, 2227-2241 CE, reigned for 14 years (illegal reign)
* Fidellion Victus, 2241-2337 CE, reigned for 96 years
* Desola Arterius, 2337-present CE
=== Colonial primarchae ===
==== Carthaan ====
* Markus Abrudas, 320-250 BCE, reigned for 70 years
* Aurelion "Auri" Abrudas, 250-? BCE
* Aurelia Abrudas, 2187-present CE
==== Bostra ====
* Aritaea Victus, 320-? BCE
* Valexien Victus, 2224-2239 CE, reigned for 15 years
* Domitia Sparatus, 2239-present CE
==== Digeris ====
* Valeria Mehrkuri
* Astraea Mehrkuri, 2186-2224 CE, reigned for 38 years
* Astraeus Mehrkuri, 2288-present CE
==== Epyrus ====
* Aetius Fedorian
==== Invictus ====
* Shastina Emperus 
==== Macedyn ====
* Caranus Caelax
* Menelus Caelax
==== Parthia ====
* Saira Aventen
* Nasira Aventen
==== Thracia ====
* Teres Kandros
* Quintus Arterius
=== Ceremonial primarchae ===
==== Uchalda ====
* Caherix Partinax
* Araxes Partinax
=== Taetrian primarchae (now independent from the Aurelian Empire) ===
* Sigestis Hieraen
* Idus Valen
* Marion Cailus, ?-present CE