Absolute monarchy, or despotic monarchy, is a form of monarchy in which one ruler has supreme authority that is not restricted by any written laws, legislature, or customs. These are often, but not always, hereditary monarchies. In contrast, in constitutional monarchies, the head of state's authority derives from and is legally bounded or restricted by a constitution or legislature.
In theory, the absolute monarch exercises total power over the land, but in practice the monarchy is counterbalanced by political groups from among the social classes and castes of the realm, such as the , clergy, and middle and higher classes.
Some monarchies have weak or symbolic legislatures and other governmental bodies that the monarch can alter or dissolve at will. Countries where a monarch still maintains absolute power are Brunei,Qatar,Oman,Saudi Arabia, the individual emirates composing the United Arab Emirates,Swaziland, and Vatican City.
In Ancient Egypt, the Pharaoh wielded absolute power over the country and was considered a living god by his people. In ancient Mesopotamia, many rulers of Assyria, Babylonia and Sumeria were absolute monarchs as well. In ancient and medieval India, rulers of the Maurya, Satahavana, Gupta and Chalukya Empires, as well as other major and minor empires, were considered absolute monarchs. In the Khmer Empire, the kings were called "Devaraja" and "Chakravartin" (King of the world), and exercised absolute power over the empire and people. Throughout Chinese history, many emperors and one empress wielded absolute power through the Mandate of Heaven. In pre-Columbian America, the Inca Empire was ruled by a Sapa Inca, who was considered the son of Inti, the sun god and absolute ruler over the people and nation.