A constitutional monarchy, parliamentary monarchy, or democratic monarchy is a form of monarchy in which the monarch exercises their authority in accordance with a constitution and is not alone in decision making. Constitutional monarchies differ from absolute monarchies (in which a monarch is the only decision-maker) in that they are bound to exercise powers and …

A consul held the highest elected political office of the Roman Republic (c. 509 BC to 27 BC), and ancient Romans considered the consulship the second-highest level of the cursus honorum (an ascending sequence of public offices to which politicians aspired) after that of the censor.Each year, the Centuriate Assembly elected two consuls to serve jointly for a one-year term.

Diarchy (from Greek δι-, di-, "double", and -αρχία, -arkhía, "ruled"), duarchy, or duumvirate (from Latin duumvirātus, "the office of the two men") is a form of government characterized by corule, with two people ruling a polity together either lawfully or de facto, by collusion and force.The leaders of such a system are usually known as corulers. ...

Creation. The first phase, sometimes referred to as the diarchy ("rule of two"), involved the designation of the general Maximian as co-emperor—firstly as caesar (junior emperor) in 285, followed by his promotion to augustus in 286. Diocletian took care of matters in the eastern regions of the empire while Maximian similarly took charge of the western regions.

Responsibilities. The CDF commands the ADF under the direction of the Minister for Defence and provides advice on matters that relate to military activity, including military operations. In a diarchy, the CDF serves as co-chairman of the Defence Committee, conjointly with the Secretary of Defence, in the command and control of the Australian Defence Organisation.

This is a list of currently reigning constituent monarchs, including traditional rulers and governing constitutional monarchs. Each monarch listed below reigns over a legally recognised dominion, but in most cases possess little or no sovereign governing power. Their titles, however, are recognised by the state.Entries are listed beside their respective dominions, and are grouped …

Julia Agrippina (6 November AD 15 – 23 March AD 59), also referred to as Agrippina the Younger, was Roman empress from 49 to 54 AD, the fourth wife and niece of Emperor Claudius.. Agrippina was one of the most prominent women in the Julio-Claudian dynasty.She was the daughter of the Roman general Germanicus and Agrippina the Elder, granddaughter of …

The King of Hanover (German: König von Hannover) was the official title of the head of state and hereditary ruler of the Kingdom of Hanover, beginning with the proclamation of King George III of the United Kingdom, as "King of Hanover" during the Congress of Vienna, on 12 October 1814 at Vienna, and ending with the kingdom's annexation by Prussia on 20 September 1866.

The article is a list of heads of state of Lithuania over historical Lithuanian state. The timeline includes all heads of state of Lithuania as a sovereign entity, legitimately part of a greater sovereign entity, a client state, or a constituent republic subject to an outside authority. Currently, the head of state is the President of Lithuania

The current concept of Thai kingship evolved through 800 years of absolute rule. The first king of a unified Thailand was the founder of the Kingdom of Sukhothai, King Sri Indraditya, in 1238. The idea of this early kingship is said to be based on two concepts derived from Hinduism and Theravada Buddhist beliefs. The first concept is based on the Vedic-Hindu caste of Kshatriya …