Despite the fact that the traditionally Catholic powers did not come to the pope's aid, the papacy rejected the 1871 "Law of Guarantees" and any substantial accommodation with the Italian Kingdom, especially any proposal which required the pope to become an Italian subject. Instead the papacy confined itself (see Prisoner in the Vatican) to the Apostolic Palace and adjacent buildings in the loop of the ancient fortifications known as the Leonine City, on Vatican Hill. From there it maintained a number of features pertaining to sovereignty, such as diplomatic relations, since in canon law these were inherent in the papacy.