The Tucson Arizona Boys Chorus will perform the world premiere of "Prayers From the Ark," a composition by Frederick Balazs, at 3 and 7 p.m., Saturday, Nov. 21. Danish pianist Torsten Juul-Borre will also perform. $50, with proceeds going toward the monastery's "Preserving Our Heritage" campaign. Visit tucsonmonastery.com for more info. Call to purchase tickets.