A couple Helpful o Photos
Image by Lawrence OP
Tomorrow, 17 December, the final week before Christmas begins, the so-called Golden Week.
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And each day, the Liturgy gives us one of the Great Antiphons invoking Christ, each of which begins with the the vocative O.
This 6th-century mosaic of the Lamb of God within an O supported by angels is on the ceiling of San Vitale in Ravenna.