Giovanni Palestrina: Credo De La Misa 'Papae Marcelli': SATB: Vocal Score

'Palestrina’s masses run the gamut of styles from the consistently contrapuntal Missa ad fugam through the largely homophonic but texturally varied Missa Papae Marcelli designed for word-intelligibility (see Jeppesen’s statistical comparison of its Gloria and Credo sections with those of other masses 1923) to the antiphonal dialogue of the four polychoral masses.'From 'Grove Music Online'