Here is the O antiphon for December 17. Let us meditate on the Holy Wisdom that is God. The name Hagia Sophia means 'Holy Wisdom' in Greek.
Dec. 17:
O Sapientia, quae ex ore Altissimi prodisti,
attingens a fine usque ad finem fortiter,
suaviter disponensque omnia:
veni ad docendum nos viam prudentiae.
O Wisdom, O holy Word of God,
you govern all creation with your strong yet tender care:
Come and show your people the way to salvation.