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| | CATHOLIC ENCYCLOPEDIA: Quem Terra, Pontus, Sidera |
 | | The Roman Breviary divides it into two parts: the first, beginning with "Quem terra, pontus, sidera", assigned to Matins in the Common Office, and also the Little Office of the Blessed Virgin; the second, beginning with "O gloriosa virginum", similarly assigned to Lauds. |
 | | Both parts conclude with the doxology of Marian hymns, "Jesu tibi sit gloria etc." As found thus, the hymns are revisions, in the interest of classical prosody, of the older hymn, "Quem terra, pontus, æthera", found in many old breviaries, and in manuscripts dating from the eighth century. |
 | | In the Cistercian office it was sung at Compline during Advent. |
| www.newadvent.org /cathen/12600b.htm (431 words) |
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