“Angelus ad virginem” is a Medieval Latin carol celebrating the Annunciation by the angel Gabriel telling the Virgin that she would conceive and bear the Christ child. The Latin lyrics are (here’s a rough translation): 1. Angelus ad virginem Subintrans in conclave. Virginis formidinum Demulcens inquit “Ave.” Ave regina virginum, Coeliteraeque dominum Concipies Et paries…