Final answer:
The National Convention sentenced King Louis XVI to death, effectively ending the rule of the monarchy in France.
Step-by-step explanation:
The National Convention played a significant role in ending the rule of the King in France. After the Revolutionary government suspended the king and formed the National Convention, they convicted King Louis XVI of treason. The radical faction of the Convention called the Mountain ultimately prevailed and sentenced the king to death. This led to the execution of King Louis XVI in January 1793, effectively ending the rule of the monarchy in France.