The Emperor of the Sagittarius Arm, often rendered simply Emperor of Sagittarius was a sovereign monarchical title held by the head of state of the Empire of Sagittarius. The office was an elective monarchy, unique among the human-ruled states of the galaxy. In the Sagittarian model of a limited, constitutional monarchy, the elected Emperor was constrained by the written statutes and by several centuries of custom. Even into the 3200s, the Emperor remained a highly limited and largely ceremonial sovereign.

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