The term 'concerning the Vatican' can be summarized by the word 'Papal'. This term refers to the Pope, who is the head of the Catholic Church and the leader of the Vatican City State. The Pope is elected by the College of Cardinals and is considered to be the successor of Saint Peter, the first Bishop of Rome. The Pope has authority over the Roman Curia, which is the administrative body of the Catholic Church. He also has the power to appoint bishops and cardinals, and to issue encyclicals and other documents.