The Wiener Sängerknaben (Vienna Boys' Choir) sings during Sunday mass in the Burgkapelle in the Hofburg; book at least six weeks in advance at www.culturall.com. Unsold choir tickets go on sale at 8am and free standing-room tickets are available at 8.30am on the day at the Burgkapelle. Queues can be long; try to arrive by 7am to increase your chances.
The choir also performs in its stunning home, the 400-seat auditorium MuTh.