Curia in ancient Rome referred to one of the original groupings of the citizenry, eventually numbering 30, and later every Roman citizen was presumed to belong to one. While they originally likely had wider powers, they came to meet for only a few purposes by the end of the Republic: to confirm the election of magistrates with imperium, to witness the installation of priests, the making of wills, and to carry out certain adoptions.

The Roman magistrates were elected officials in ancient Rome. During the period of the Roman Kingdom, the King of Rome was the principal executive magistrate. His power, in practice, was absolute. He was the chief priest, lawgiver, judge, and the sole commander of the army. When the king died, his power reverted to the Roman Senate, which then chose an Interrex to facilitate the election of a new king.