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The Master of the Administratum is one of the most ancient major Imperial leadership position. It was one of the four original [[Senatorum Imperialis_#History|Magisters Temporal]] of the [[Unification Wars]]-era alongside the [[Grand Provost Marshal]], [[Lord Commander Militant]], and [[Chancellor of the Estate Imperium]].{{Fn|8}} Following the formation reformation of the High Lords of TerraImperium after the [[Horus Heresy]], the Master of the Administratum emerged as the most powerful of the High Lords. This status was challenged by the emergence of the [[Ecclesiarch]] as a permanent member of the High Lords, starting the [[Age of Apostasy]]. Following the rise of [[Goge Vandire]] as Master of the Administratum, his use of assassins and manipulation of Ecclesiarch [[Paulis III]] allowed him to assume a dominant role among the High Lords. This was further strengthened when he assumed the post of Ecclesiarch. Following his death at the hands of [[Alicia Dominica]], the Ecclesiarch lost many of its original powers, and the Master of the Administratum reemerged as the dominant High Lord.{{Fn|2}}