The "O Antiphons" refer to the seven antiphons that are recited (or chanted) preceding the Magnificat during Vespers of the Liturgy of the Hours. They cover a special period of Advent preparation known as the Octave before Christmas, Dec. 17-23. The importance of "O Antiphons" is two-fold: Each one highlights a title for the Messiah: O Sepentia (O Wisdom), O Adonai (O Lord), O Radix Jesse (O Root of Jesse), O Clavis David (O Key of David), O Oriens (O Rising Sun), O Rex Gentium (O King of the Nations), and O Emmanuel. Also, each one refers to the prophecy of Isaiah of the coming of the Messiah ( O Clavis David).
If you click on the second photo you can see that after I added a piece of dark green metallic card stock to the backs of the "book", I added a paper with all the antiphons explained on the left side. In the right side we have placed blocks (painted gold with symbols drawn on) for each day of the octave. I put them all in so you could see them, but really, there are only 5 in there today. Next year, I'd like to do a better job with the pictures on the blocks. I really like how this turned out. Thanks to all the ladies over at 4Real who shared all their "O Antiphon" ideas--that's how I came up with this.