 Isabeau was honored in 1389 with a lavish coronation ceremony and entry into Paris. In 1392 Charles suffered the first attack of what was to become a lifelong and progressive mental illness, resulting in periodic withdrawal from government. The episodes occurred with increasing frequency, leaving a court both divided by political factions and steeped in social extravagances. A 1393 masque for one of Isabeau's ladies-in-waiting — an event later known as Bal des Ardents — ended in disaster with the King almost burning to death. Although the King demanded Isabeau's removal from his presence during his illness, he consistently allowed her to act on his behalf. In this way she became regent to the Dauphin of France (heir apparent), and sat on the regency council, allowing far more power than was usual for a medieval queen.
