Tra Le Sollecitudini

(It. "Among the concerns"; also known as Motu Proprio)

   Papal encyclical promulgated by Pope Pius X on 22 November 1903 that reaffirmed the traditional norms for liturgical music in the Roman Catholic rite. In particular, the encyclical approved Gregorian chant as the "supreme model" for sacred music and also "Classical Polyphony" as embodied in the works of Giovanni da Palestrina (Art. 3, 4). Modern music may provide excellent works for liturgy, but explicit secular influences, such as the theater, are prohibited, including concerted works. Organ music is permitted but not as alternatim. The length of compositions should not overwhelm liturgical actions.

   See also Cecilian Movement; Constitution on the Sacred Liturgy; Council of Trent.