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
Prisoner in the Vatican Pope Pius IX in 1849 and 1860, and it was in sharp contrast to the letter that Garibaldi had written to the pope from Montevideo in 1847, before those events. The stand-off was ended on 11 February 1929, when the Lateran Pacts created a new microstate, that of Vatican City, and opened the way for diplomatic relations between Italy and the Holy See. The Holy See in turn recognized the Kingdom of Italy, with Rome as its capital, thus ending the situation whereby the popes had felt constrained to remain within the Vatican. Subsequently, the popes resumed visiting their cathedral,