I WONDER - What King Had The Shortest Reign In History?

King Louis XIX of France holds the record for the shortest reign in history, lasting only 20 minutes. He became king after his father, Charles X, abdicated during the July Revolution of 1830. Louis XIX also chose to abdicate shortly after, passing the throne to the next in line.

What event led to the abdication of Louis Antoine's father?

What record does Louis Antoine hold in terms of reign duration?