The Burning Maze horse is Incitatus, and its owner is the third emperor, Caligula. They return to Aeithales and convey the news to the spirits. Grover tells Apollo about a part of the Labyrinth that is burning, causing droughts and water shortage in the upper world. Hedge and Mellie reveal that Piper McLean and Jason Grace had explored the Labyrinth. Apollo decided to meet with them. Meg plants the seeds with which her father had planned to reincarnate the Meliai. Apollo, Meg and Grover meet Piper and bring Jason, who had broken up with Piper, from his school the following day. Jason confidentially
Holy Roman Emperor office. Starting with Ferdinand I, all successive Emperors forwent the traditional coronation. The interregnum of the Holy Roman Empire is taken to have lasted from the deposition of Frederick II by Pope Innocent IV (1245, alternatively from the death of Frederick 1250 or the death of Conrad IV 1254) to the election of Rudolf I of Germany (1273). Rudolf was not crowned emperor, nor were his successors Adolf and Albert. The next emperor was Henry VII, crowned on 29 June 1312 by Pope Clement V. The Emperor was crowned in a special ceremony, traditionally performed by the Pope in Rome.