O ”. ▁An ▁anti phon ▁is ▁a ▁verse ▁from ▁the ▁Holy ▁Script ure ▁that ▁is ▁to ▁be ▁s ung ▁before ▁and ▁after ▁the ▁reading ▁of ▁a ▁ps alm ▁( O tt en ▁ 1 ). ▁The ▁verse ▁selected ▁for ▁the ▁anti phon ▁is ▁chosen ▁to ▁reflect ▁the ▁fundamental ▁ideas ▁presented ▁during ▁the ▁ps alm . ▁Seven ▁of ▁the ▁anti ph ons ▁in ▁Christ ▁I ▁have ▁come ▁to ▁be ▁known ▁as ▁the ▁“ Se ven ▁Gre ater ▁Anti ph ons ” ▁for ▁their ▁use ▁in ▁the ▁Magn ific at . ▁The ▁opening ▁inter jections ▁of ▁the ▁“ Se ven ▁Gre ater ▁Anti ph ons ” ▁include , ▁" O ▁S ap ient ia ", ▁" O ▁Ad on ai ", ▁" O ▁Rad ix ▁J esse ", ▁" O ▁Cla vis ▁David ", ▁" O ▁Ori ens ", ▁" O ▁R ex ▁Gent ium ", ▁and ▁" O ▁Em manuel ". ▁The ▁remainder ▁of ▁the ▁anti ph ons ▁used ▁in ▁Christ ▁I ▁had ▁come ▁to ▁be ▁included ▁with ▁the ▁“ Gre ater ▁Anti ph ons ” : ▁“ O ▁Vir go ▁vir gin um ”, ▁“ O ▁Gabriel ”, ▁“ O ▁R ex ▁pac ifice ”, ▁“ O ▁M und i ▁Dom ina ”, ▁and ▁“ O ▁Hier usalem ”. ▁ ▁Sub ject ▁ ▁The ▁foundation ▁of ▁the ▁work ▁der ives ▁from ▁the ▁topic ▁of ▁the ▁Advent . ▁The ▁Advent , ▁in ▁its ▁most ▁general ▁definition , ▁is ▁the ▁time ▁period ▁leading ▁up ▁to ▁the ▁anni versary ▁of ▁the ▁coming ▁of ▁Christ . ▁Advent