The Constitution of the Roman Empire is the supreme law under which the Roman Empire functions. It is the first Roman constitution since the largely unwritten Republican Constitution that evolved through out the Republic's existence.

The Constitution is particularly notable for establishing the Augusta system of government. It created the office of the Prime Minister and also transformed the Roman Imperial Senate into its present form. The Constitution has since then been revised four times, the latest in 1982. However, the two latter revisions of the constitution have since been repealed, and the constitution featuring the first amendment now serves as the current charter of the Imperial government.

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