Prisoner in the Vatican the Basilica of St. John Lateran, situated on the opposite side of the city of Rome, and to travel regularly to their summer residence at Castel Gandolfo, from Rome. Prisoner in the Vatican A prisoner in the Vatican or prisoner of the Vatican (; ) is how Pope Pius IX was described following the capture of Rome by the armed forces of the Kingdom of Italy on 20 September 1870. Part of the process of Italian unification, the city's capture ended the millennial temporal rule of the popes over central Italy and allowed Rome to be designated the capital of
Vatican City within Italy, its military defence is provided by the Italian armed forces. However, there is no formal defence treaty with Italy, as the Vatican City is a neutral state. Vatican City has no armed forces of its own, although the Swiss Guard is a military corps of the Holy See responsible for the personal security of the Pope, and resident in the state. Soldiers of the Swiss Guard are entitled to hold Vatican City State passports and nationality. Swiss mercenaries were historically recruited by Popes as part of an army for the Papal States, and the Pontifical Swiss Guard was