The Guangxu Emperor married and took up the reins of power in 1889. By that year, the emperor was already 18, older than the conventional marriage age for emperors. Prior to his wedding, a large fire engulfed the Gate of Supreme Harmony at the Forbidden City. This event followed a trend of recent natural disasters that were considered alarming by many observers. According to traditional Chinese political theory, such incidents were taken as a warning of the imminent loss of the "Mandate of Heaven" by current rulers.