Stile antico
Stile antico, literally 'ancient style', is a term describing the contrapuntal, vocal style of the late 16th Italian composers, with Palestrina as primary model (hence: Palestrina style). It's principles were explored by J. J. Fux in his 'Gradus ad Parnassum' (1725), which codified Palestrina's style into a set of rules to train composers in the art of strict polyphony.
Stile antico has been associated with Baroque, Classical and Romantic composers of church music. Characteristic features are
  • melody: relatively long note values (whole, halve, quarter and some eights), stepwise movement, no ornaments; so a vocal design
  • harmony: modal orientation, relatively simple (triads, third-sixth-chords) and controlled dissonance-resolution procedures
  • texture: polyphonic design; imitation technique
  • ala breve
Examples can be found in the work of e.g. Frescobaldi (Kyrie 3, Messa della Madonna from Fiori Musicali), Biber (Missa Alleluja, fragments as beginning Sanctus), Bach (Mass in B minor, Clavierübung III, e.g. Kyrie Gott Vater in Ewigkeit, BWV 669), Haydn (Missa Sancti Nicolai, Missa Sunt bona mixta malis), Mozart (Requiem, Vesperae solennes de Confessore), Beethoven (Missa Solemnis) and Bruckner (Motet Virga Jesse floruit).

Below two examples from Bach's Clavierübung III, the first in a instrumental, baroque style and the second in the vocal, stile antico style.

stile_antico (102K)


Remark
In the early Baroque Claudio Monteverdi and his brother coined the term prima pratica to refer to the older style of Palestrina, and seconda pratica (= stile moderno) to refer to Monteverdi's music.