The king either assumed the authority by might, was appointed by his predecessor (usually inherited). Some were also appointed by the Catholic Church in Rome.
The king and the Church.
In the Early Middle Ages, and in the rest of the middle ages in the West, the Pope was most powerful. In the later middle ages in the East, it was the Patriarch of Constantinople.
The Enlightenment gave people a reason to believe in their own thoughts and not have the king or monarchy tell them what to think. The began to use their own reason. The Enlightenment however was after the middle ages.
In the Middle Ages, the king was primarily protected by knights and nobles who served as his vassals. These warriors were bound by feudal loyalty to defend the king and uphold his authority in exchange for land and titles. Additionally, a king might also rely on a personal guard or elite soldiers, known as the king's retinue, to ensure his safety during travel and in times of conflict.
A king (or lord) ruled large areas of land. To protect his land from invasion, the king gave parts of it to local lords, who were called vassals.
The king and the Church.
In the Early Middle Ages, and in the rest of the middle ages in the West, the Pope was most powerful. In the later middle ages in the East, it was the Patriarch of Constantinople.
The King does give the land to the Nobles so they can help fight to defend the King's land, him and his kingdom (castle).
The Enlightenment gave people a reason to believe in their own thoughts and not have the king or monarchy tell them what to think. The began to use their own reason. The Enlightenment however was after the middle ages.
King Henry VIII
The system of German princes electing the king weakened royal authority, so states of Germany didn't unify during the middle ages.
They did that - we are talking about the feudal system in the Middle Ages - by giving them lands, their proceeds and the authority over them in the King's name.
The king
bubbles
the king
I'd say King John
A king (or lord) ruled large areas of land. To protect his land from invasion, the king gave parts of it to local lords, who were called vassals.