«QUEM TERRA, PONTUS, SIDERA». – Hymn of Matins in the Common of feasts of the Madonna.
It consists of four stanzas taken from the hymn of Venantius Fortunatus, which extol the privilege of the Virgin, in whose womb the Creator of heaven and earth became incarnate.
BIBL.: H. A. Daniel, Thesaurus hymnolog., III, Leipzig 1847, p. 321; G. G. Belli, Gli inni del Breviario tradotti, Rome 1856, p. 410; C. Albin, La poésie du Bréviaire, Lyon n.d., pp. 453–456; A. Mirra, Gli inni del Breviario romano, Naples 1947, pp. 159–61. Silverio Mattei