Check it out on these links:
Praising the Names of Jesus: The Antiphons of Advent
The O Antiphons
Ego Cras (Anagram of the Messianic Titles of Christ in the "O" Antiphons)
Praying with the "O" Antiphons
The 'O' Antiphons -- Prayer Activity for Families
O Antiphons -- Scriptural Detail of these Advent prayers
The Great Advent Antiphons
What are the O Antiphons?
“Lo, how a rose e’er blooming” is just lovely...
Interesting. Thanks!