When Napoleon first abdicated in 1814, at the "invitation" of Emperor Francis of Austria, the French empress, his daughter Louise, arrived at this Austrian palace with her son on May 21st. From then on, she became a crowned hostage.,After she finished speaking, she hugged her son again, "Poor child...",The Roman emperor's name was Napoleon-Franois-Joseph-Charles-Bonaparte (Napoleon-Franois -Joseph-Charles-Bonaparte). Emperor Napoleon also gave him the nickname Aiglon, which means "young eagle".。