« DECORA LUX AETERNITATIS, AUREAM ». — This is the hymn of Vespers for the feast of the holy apostles Peter and Paul, composed of the first and sixth stanzas of the hymn attributed to Elpidia in honor of the Prince of the Apostles, which begins: Aurea luce et decore roseo, subsequently reworked by the correctors under Urban VIII.
BIBL.: G. Belli, The Hymns of the Breviary, Rome 1856, p. 274; V. Terreno, The Hymns of the Divine Office, Mondovì 1932, p. 218; A. Mirra, The Hymns of the Roman Breviary, Naples 1947, p. 219. Silvério Mattei