Absolute monarchy is a form of monarchy in which the sovereign is the sole source of political power, unconstrained by constitutions, legislatures or other checks on their authority.
Louis XIV of France
King Frederick II of Prussia, "the Great"
Photograph of Tsar Alexander II, 1878–81
Image: Salman of Saudi Arabia 2020 (49563590728) (cropped)
A monarchy is a form of government in which a person, the monarch, is head of state for life or until abdication. The political legitimacy and authority of the monarch may vary from restricted and largely symbolic, to fully autocratic, and can span across executive, legislative, and judicial domains.
The Weld-Blundell Prism, inscribed with the Sumerian King List
King George III of the United Kingdom, portrait by Allan Ramsay, 1762
King Salman of Saudi Arabia is an absolute monarch.
Postcard of ruling monarchs, taken in 1908, between February (accession of King Manuel II of Portugal) and November (death of the Guangxu Emperor)