A Phrygian

A Phrygian is written using the 1♭ key signature, meaning that the same set of accidentals is used throughout the notation.

Other keys and modes written with the same key signature include A Phrygian Dominant, B♭ Lydian, D Aeolian Major Tonic, D minor, F Major, G Dorian.

Below is a list of songs written using this mode.