In music theory, a plagal cadence is a type of harmonic cadence in which the subdominant chord moves directly to the tonic chord. It is also sometimes called the Amen cadence due to its prevalence at the ending of hymns, particularly those published between the mid-19th and mid-20th centuries. The plagal cadence has been described of having a "sad" sound, as opposed to the authentic cadence's more "lively" resolution.