The killing of a King is called regicide - an example of regicide was Oliver Cromwell beheading King Charles I of England.
Regicide
When king Darius was retreating after defeat at Gaugamela, Bessus killed him and made himself king. When he was captured, Alexander had him tried and executed for regicide.
The Regicide of Louis XVI.
The Reign of Terror. The Regicide of Louis XVI. The Death of Marie Antoinette.
King Louis XVI was the victim of Regicide.
Macbeth was not a vassal of King Duncan. Macbeth's act of killing King Duncan would be considered regicide because he unlawfully killed his king, who was his sovereign and ruler.
Regicide is the murder of a king.
It's still called regicide
The man comided regicide on linken
The man committed regicide.
A murderer; traitor; assassin; treason
Richard Deane - regicide - was born in 1610.
Richard Deane - regicide - died in 1653.
Thomas Chaloner - regicide - was born in 1595.
John Cook - regicide - died in 1660.
John Cook - regicide - was born in 1608.
John Fry - regicide - was born in 1609.