O Sapientia

My favourite Baroque composer, Marc-Antoine Charpentier, set all the O Antiphons to music – beautiful texts containing "the very marrow of Advent" to quote Dom Guéranger – together with the O salutaris hostia (one imagines this was sung at Benediction after Vespers on each of the last days of Advent).

Here is part of a recording thereof; the first of these Greater Antiphons, O Sapientia, begins at 2:37.