The Ithaca Community Chorus & Chamber Singers will present beloved pieces by two eminent twentieth-century composers at 7:30 p.m. on Saturday, May 10, at St. Paul’s United Methodist Church, 402 North Aurora Street, Ithaca: Randall Thompson’s “Frostiana” and “Alleluia,” and “Lux Aeterna” and “O Magnum Mysterium” by Morten Lauridsen. Tickets are $20 (students & children free) and are available in advance online at https://acithaca.org/groups/icccs/tickets/ and at the door.