Republic is a form or model of political organization that originated in ancient Rome, in the 6th century BC, after the overthrow of the last Etruscan king, Tarquinio, who had influence over the region of Lazio, on the Italic Peninsula, where Rome is located. The end of the monarchy in Rome was caused by a political coup by the patrician aristocracy of the city.
It is from the structure of the Roman Republic that the main modern political institutions, such as Parliament, derived from members representing the population, were derived. Parliament, today, makes up the political structure of both presidential regimes (in which the president is the head of government and the head of state at the same time), like the American, and of monarchist regimes, such as the Kingdom United and Japan (in which the head of state is the monarch, and the head of government is the prime minister). There is also the variant of the mixed model, presidential parliamentarism, in which the president is the head of state, and the prime minister, the head of government.
In ancient Rome, the senate and assemblies constituted this “parliamentary body”. From the senators came the authority over the magistrates, who had administrative functions according to their rank and jurisdiction, similarly to what happens today with the members of the republican executive branch. Among the positions of the judiciary in the Roman Republic were consuls (the highest rank), praetors, censors, quaestors, edis and, on specific occasions, such as wartime, the dictator.
