Sunday at eleven, two minutes from the Hofburg: a complete orchestral mass by Mozart, Haydn, Schubert or Beethoven, with the choir, soloists and orchestra of St Augustine. Free entry, a donation is welcome.

Said honestly: this is a mass, not a concert. Anyone who knows that and comes anyway hears Vienna as it has sounded for centuries. If you would rather sleep in: the Jesuitenkirche does the same at half past ten, and the room with its Pozzo frescoes is spectacular. hochamt.augustiner.at.