In music, polyphony is a texture consisting of two or more independent melodic voices, as opposed to music with just one voice (monophony) or music with one dominant melodic voice accompanied by chords (homophony).

Within the context of the Western musical tradition, the term is usually used to refer to music of the late Middle Ages and Renaissance. Baroque forms such as the fugue, which might be called polyphonic, are usually described instead as contrapuntal. Also, as opposed to the species terminology of counterpoint, polyphony was generally either "pitch-against-pitch" / "point-against-point" or "sustained-pitch" in one part with melismas of varying lengths in another (van der Werf, 1997). In all cases the conception was likely what Margaret Bent (1999) calls "dyadic counterpoint", with each part being written generally against one other part, with all parts modified if needed in the end. This point-against-point conception is opposed to "successive composition", where voices were written in an order with each new voice fitting into the whole so far constructed, which was previously assumed.

Giovanni Pierluigi da Palestrina (3 February 1525 or 2 February 1526 – 2 February 1594) was an Italian Renaissance composer of sacred music and the best-known 16th-century representative of the Roman School of musical composition. He had a lasting influence on the development of church music, and his work has often been seen as the culmination of Renaissance polyphony.

Palestrina was born in the town of Palestrina, near Rome, then part of the Papal States. Documents suggest that he first visited Rome in 1537, when he is listed as a chorister at the Santa Maria Maggiore basilica. He studied with Robin Mallapert and Firmin Lebel. He spent most of his career in the city.

Palestrina came of age as a musician under the influence of the northern European style of polyphony, which owed its dominance in Italy primarily to two influential Franco-Flemish composers, Guillaume Dufay and Josquin des Prez, who had spent significant portions of their careers there. Italy itself had yet to produce anyone of comparable fame or skill in polyphony.

Thomas Tallis (c. 1505 – 23 November 1585) was an English composer. Tallis flourished as a church musician in 16th century Tudor England. He occupies a primary place in anthologies of English church music, and is considered among the best of England's early composers. He is honoured for his original voice in English musicianship. No contemporary portrait of Tallis survives: the earliest, painted by Gerard van der Gucht, dates from 150 years after Tallis died, and there is no certainty that it is a likeness.

Little is known about Tallis's early life, but there seems to be agreement that he was born in the early 16th century, toward the close of the reign of Henry VII. Little is known about Tallis's childhood and his significance with music at that age. However, there are suggestions that he was a child of the chapel royal St. James's palace, the same singing establishment which he later went to as a man. His first known appointment to a musical position was as organist of Dover Priory in 1530–31, a Benedictine priory at Dover (now Dover College) in 1532. His career took him to London, then (probably in the autumn of 1538) to the Augustinian abbey of Holy Cross at Waltham until the abbey was dissolved in 1540. Tallis acquired a volume at the dissolution of the monastery of Waltham Holy Cross and preserved it; one of the treatises in it was by Leonel Power, and the treatise itself prohibits consecutive unisons, fifths, and octaves.