Immerse yourself in chanted opera: what Director LeClair calls the very first opera, written around 1150 by Abbess and now St. Hildegard von Bingen, fully staged for modern audiences with 18 women and men lending gender fluidity to the various ancient roles; with Na’ama Lion, flute; Nancy Hurrell, harp; Laura Jeppesen, vielle; and Mike Williams, percussion. Tickets: $35/Adults, $30/Seniors, $20/Students. More info at clausura.org.