well as certain modes, were actually forbidden in the church because of their association with secular music and pagan rites. After banishing polyphony from the Liturgy in 1322, Pope John XXII warned against the unbecoming elements of this musical innovation in his 1324 bull Docta Sanctorum Patrum. In contrast Pope Clement VI indulged in it. The oldest extant polyphonic setting of the mass attributable to one composer is Guillaume de Machaut's Messe de Nostre Dame, dated to 1364, during the pontificate of Pope Urban V. The Second Vatican Council said Gregorian chant should be the focus of liturgical services, without excluding other forms of sacred music, including polyphony. Notable works and artists Tomás Luis de Victoria William Byrd, Mass for Five Voices Thomas Tallis, Spem in alium Orlandus Lassus, Missa super Bella'Amfitrit'altera Guillaume de Machaut, Messe de Nostre Dame Geoffrey Chaucer Jacob Obrecht Palestrina, Missa Papae Marcelli Josquin des Prez, Missa Pange Lingua Gregorio Allegri, Miserere Protestant Britain and the United States English Protestant west gallery music included polyphonic multi-melodic harmony, including fuguing tunes, by the mid-18th century. This tradition passed with emigrants to North America, where it was proliferated in tunebooks, including shape-note books like The Southern Harmony and The Sacred Harp. While this style of singing has largely disappeared from British and North American sacred music, it survived in the rural Southern United States, until it again began to grow a following throughout the United States and even in places such as Ireland, the United Kingdom, Poland, Australia and New Zealand, among others. Balkan region Polyphonic singing in the Balkans is traditional folk singing of this part of southern Europe. It is also called ancient, archaic or old-style singing. Byzantine chant Ojkanje singing, in Croatia, Serbia and Bosnia and Herzegovina Ganga singing, in Croatia, Montenegro and Bosnia and Herzegovina Epirote singing, in northern Greece and southern Albania (see below) Iso-polyphony, in southern Albania (see below) Gusle singing, in Serbia, Montenegro, Bosnia and Herzegovina, Croatia and Albania Izvika singing, in Serbia Dvuglas singing in Southern Bulgaria: woman choirs in Shopluk (Bistritsa Babi) and in Rhodopes (Nedelino), as well as men choirs in Bansko, Pirin Macedonia Incipient polyphony (previously primitive polyphony) includes antiphony and call and response, drones, and parallel intervals. Balkan drone music is described as polyphonic due to Balkan musicians using a literal translation of the Greek ('many voices'). In terms of Western classical music, it is not