Some countries are still using the system of government monarchy / empire in the 20th century.

In the 20th century, there are still some countries that are applying the system of monarchy or the royal government. means the state of the monarchy headed by a monarch, this system is the world's oldest system of government.
the difference of the monarchy with the monarch's presidency is going to be head of state until he mati.tapi now the system is virtually no longer exist and most of the constitutional monarchy, meaning that the monarch is limited by its power by the constitution.
Below are some countries that still use the royal or imperial system.