Kassia, Cassia or Kassiani was a Byzantine-Greek composer, hymnographer and poet. She holds a unique place in Byzantine music as the only known woman whose music appears in the Byzantine liturgy. Approximately fifty of her hymns are extant, most of which are stichera, though at least 26 have uncertain attribution. The authenticity issues are due to many hymns being anonymous, and others ascribed to different authors in different manuscripts. She was an abbess of a convent in the west of Constantinople.

Romanos the Melodist was a Byzantine hymnographer and composer, who is a central early figure in the history of Byzantine music. Called "the Pindar of rhythmic poetry", he flourished during the sixth century, though the earliest manuscripts of his works are dated centuries after this. He was the foremost Kontakion composer of his time.