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
Vatican Historical Museum to a more luxurious locale, none of the rooms had been allowed to be used for any general public purpose. Since 1991, these rooms have been exclusively used as exhibition or display rooms for the exhibits moved from the Vatican Museums. The museum has been arranged into two wings. The principal wing is the museum of all artistic and historic importance starting with the paintings of the history of the Papal States, portraits of Popes till date, memorabilia of the Papal Military Corps including the navy, documents related to ceremonial orders of Popes, the Papal household items, and various ceremonial