The Augusta system is a democratic parliamentary system of government that is modelled after the politics of the Roman Empire. Its name comes from the Curia Augusta, the seat of the Roman Imperial Senate.
Nations that use the Augusta system have two individuals that are in power: one belonging to a political party that is elected to power by the general population, and one that is appointed by the legislature of the country. One notable example is the Emperor and Prime Minister of the Roman Empire.
While the head of state acts as a sort of figurehead, he also shares a executive role with the head of government. This means that the head of state gets a large say in the legislative proceedings of the nation, and also has significant executive powers.