Monarchy

"A monarchy is a form of government in which a natural person, the monarch, is head of state until death or abdication. The governing power of the monarch may vary from purely symbolic (crowned republic), to restricted (constitutional monarchy), to fully autocratic (absolute monarchy), combining executive, legislative and judicial power.

In most cases, monarchies are hereditary, but there are also elective and self-proclaimed monarchies. Aristocracy, though not inherent to monarchies, often serves as the pool of persons to draw the monarch from and fill the constituting institutions (e.g. diet and court), giving many monarchies oligarchic elements." - (en.wikipedia.org 28.10.2019)