The Bach Society of Dayton presents the Bach Society Chorus and Orchestra in a concert of French Catholic compositions. Program: Durufle’s “Four motests based on Gregorian Themes” (Ubi caritas, Tota pulchra, Tu es petrus, and Tantum Ergo”); Poulenc’s Gloria, and his Concerto for Organ, strings, and timpani in G Minor. Tickets are $20 adults, $10 students, $15 active military; no fee for children 10 and under. First concert in the 2017-2018 Back Society Dayton season. Concert preview at 3 pm.