Not only is the Palace Caldera largely based on the design of the Forbidden City in Beijing, they also share a similar fate when it comes to lightning. Kinda :)
The Forbidden City burned down multiple times, the first time -not even a year after it was built- in 1421 lightning struck the central great halls i.e. the Hall of Supreme Harmony, the Hall of Central Harmony and the Hall of Preserved Harmony. Most of the Forbidden City burned down, killing many of it’s residents. It was seen as such a bad omen that Emperor Yongle did not dare have the halls rebuilt. This only happened three Emperors later during the reign of Emperor Zhengtong.