Was Louis XIX only king of France for 20 minuets?

Yes, Louis XIX was technically king of France for about 20 minutes on August 2, 1830. He ascended to the throne after his father, Charles X, abdicated during the July Revolution. However, Louis XIX renounced his claim to the throne in favor of his son, making his reign extremely brief and largely symbolic. His short time as king is often overshadowed by the events leading to the establishment of the July Monarchy.