Which cadence is formed by the chord progression IV - I?

The chord progression IV - I creates what is known as a plagal cadence. This cadence is characterized by its specific movement from the subdominant (IV) to the tonic (I) chord. In traditional Western music, the plagal cadence often mirrors the structure and resolution of sacred music, particularly in hymns, where it is frequently heard as a conclusion often associated with the phrase "Amen."

The IV chord's placement before the I chord produces a sense of warmth and resolution that is unique to the plagal cadence, contrasting with other types of cadences that might create a stronger sense of closure in a different manner. This unique characteristic makes it a significant concept in understanding harmonic progression within music theory.