However, it was Praetorius who, in 1618, provided the first systematic definition of the quodlibet as "a mixture of diverse elements quoted from sacred and secular compositions".
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Bach's Wedding Quodlibet or Quodlibet, which is not a quodlibet by the above definition but a ten-minute procession of nonsense, jokes, puns, obscure cultural references, word games, and parody of other songs.
Numerous variations of the carol include an arrangement by William Llewellyn as a "quodlibet" for choir: London Waits (Past Three O'clock).