Plagal Cadence

A means of getting back to the tonic from IV, the progression is typically: ivm - bVIIx - I.
Although this is seriously non-diatonic, being a ii - V in the key of bIII, it sounds natural and familiar. It is a commonly used trick.
As ivm and bVIIx are functionally similar, the sequences ivm - I or bVII - I could also be used. iiØ is another chord with similar function that could be used.

Variants

1. Two chords: ivm - bVIIx - I

   references:

   none

2. One chord: bVIIx - I or ivm - I or iiØ - I

   references:

   There Will Never Be Another You
   It Could Happen to You
   

3. Ending on chord other than I

   bVIIx - iii.

   references:

   Weaver of Dreams

4. Used from I to V

   none

   references:

   none

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