Music of Vatican City a result, reformers like Palestrina revised the rules behind Gregorian chanting, which were printed by the Medici Press in Rome; these reforms continued to be followed to the present day. A traditional musical instrument was the pipe organ. After the end of the Papal States the Popes' ability to sponsor composers and musicians waned. However it did not end entirely nor did interest in the subject. Pope Pius X and Pope Pius XII both wrote on the subject. In modern times John Harbison and Gilbert Levine have composed or conducted for the Vatican. Although not of the Vatican a Christmas
Islamist plots to attack the Vatican strike," referencing ISIS leader Abu Bakr al-Baghdadi. The 2010 plan was allegedly to attack the Vatican with a bomb. It was uncovered after the arrest of 9 individuals on 24 April 2015 by Italian DIGOS detectives on charges of plotting to bomb the Vatican. There was evidence that the 9 October 2009 Peshawar bombing in Pakistan was substantially planned and financed from Olbia, Sardinia, and that some Italy-based militants took part in it. Islamist plots to attack the Vatican Islamist plots to attack the Vatican refers to two alleged terrorist plans to attack the Vatican, neither of which were carried