Absolute monarchy

Absolute monarchy.Absolute monarchy is a monarchical form of government where the monarch has the power to rule his or her land or country and its citizens freely, with no laws or legally organized direct opposition in force.
Although some religious authority may be able to discourage the monarch from some acts and the sovereign is expected to act according to custom, in an absolute monarchy there is no constitution or body of law above what is decreed by the sovereign (king or queen).
Although six absolute monarchies still exist (Vatican City, Saudi Arabia, Swaziland, Oman, Brunei, Bhutan), the popularity of the notion of absolute monarchy declined substantially after the French Revolution and American Revolution, which promoted theories of government based on popular sovereignty.

Constitutional Monarchy.
A Constitutional Monarchy is a form of monarchical government established under a constitutional system which acknowledges an elected or hereditary monarch as head of state, as opposed to an absolute monarchy, where the monarch holds absolute power.
The process of government and law within a constitutional monarchy is usually very different from that in an absolute monarchy.
In representative democracies that are constitutional monarchies, like the United Kingdom, the monarch may be regarded as the head of state but the prime minister, whose power derives directly or indirectly from elections, is head of government