It never happened.
It was King Louis XVI. He was executed on january 21 1793
King Louis XVI of France was executed on January 21, 1793, after being found guilty of treason.
There was no King, the revolution executed the king early on in the revolution.
If you're talking about Louis XVI of France after the French Revolution then its 1793
He was executed using the guillotine on the 21st January 1973.
By guillotine powered by a horse
King Louis XVI of France was executed on 21 January 1793.
He became King of France when his grandfather (the King of France then) Louis XV died, on May 10th, 1774.
Louis XIV and Marie antoiett
Because he was the last King of France and because the was executed by his own people.
Louis XVI (born Louis-Auguste) was the last King of France before the French Revolution. He was executed for treason by guillotine in 1793.
King Louis the 16th and Queen Marie Antoinette