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
Prophecy of the Popes the Roman". In the "Lignum Vitae", the line "In persecutione extrema S.R.E. sedebit." forms a separate sentence and paragraph of its own. While often read as part of the "Peter the Roman" prophecy, other interpreters view it as a separate, incomplete sentence explicitly referring to one or more popes between "the glory of the olive" and "Peter the Roman". The list can be divided into two groups; one of the popes and antipopes who reigned prior to the appearance of the prophecies c. 1590, for whom the connection between the motto and the pope is consistently clear. The other is