Sunday, quarter past nine, since 1498. This is not a performance, it is a mass: a complete setting by Mozart, Haydn or Schubert, sung by the boys’ choir or the girls’ choir, with members of the State Opera orchestra and the men’s chorus.

Said honestly: the choir sings from the gallery and you barely see them. If you want photographs of boys in sailor suits, this is the wrong room. If you want to hear how Vienna sounds, it is exactly the right one. Tickets from 14 euro, standing room at the back is free, handed out from half past eight. hofmusikkapelle.gv.at.