certain places of worship, such as Winchester College in England, the more archaic spelling quirister is used. An Anglican choir typically uses "SATB" voices (soprano or treble, alto or counter-tenor, tenor, and bass), though in many works some or all of these voices are divided into two for part or all of the piece; in this case the two halves of the choir (one on each side of the aisle) are traditionally named decani and cantoris which sing, respectively, Choir 1 and Choir 2 in two-choir music. There may also be soloists, usually only for part of the piece. There are also works for fewer voices, such as those written for solely men's voices or boys'/women's voices. Vestments At traditional Anglican choral services, a choir is vested, i.e. clothed in special ceremonial vestments. These are normally a cassock, a long, full-length robe which may be purple, red or black in colour, over which is worn a surplice, a knee-length white cotton robe. Normally a surplice is only worn during a service of worship, so a choir often rehearses wearing cassocks only. Younger choristers who have newly joined a choir begin to wear a surplice after an initial probationary period. Cassocks originated in the medieval period as day dress for clergy, but later came into liturgical use. Additionally, junior choristers may wear a ruff, an archaic form of dress collar, although this tradition is becoming less common. In some establishments, including the Choir of King's College, Cambridge, Eton collars are worn. Whist singing the offices, adult choir members may also wear an academic hood over their robes. In England, young choristers who have attained a certain level of proficiency with the Royal School of Church Music, an international educational organisation that promotes liturgical music, may wear an RSCM medallion. History Prior to the Reformation, music in British churches and cathedrals consisted mainly of Gregorian chant and polyphonic settings of the Latin Mass. The Anglican church did not exist as such, but the foundations of Anglican music were laid with music from the Catholic liturgy. The earliest surviving examples of European polyphony are found in the Winchester Tropers, a manuscript collection of liturgical choral music used at Winchester Cathedral, dating from the early-eleventh to mid-twelfth centuries. By the time of King Henry V in the fifteenth century, the music in English cathedrals, monasteries and collegiate churches had developed a distinctive and influential