Spem in alium: The 40-Part Motet and Other Music

A motet is a polyphonic vocal composition, usually on a sacred Latin text, that emerged in the High Middle Ages and became a central genre of European art music during the Renaissance. Early motets layered different texts and rhythms above a chant-derived tenor, while later Renaissance motets favored smooth, imitative counterpoint shared among voice parts. Across its long history the motet served both liturgical and devotional functions, typically performed a cappella by small choirs. Stylistically it ranges from the rhythmically intricate, isorhythmic constructions of the 13th–14th centuries to the balanced, text-sensitive writing of the 16th century, and onward to concerted and chorale-based treatments in the Baroque and beyond.