Kassiani is one of the first composers whose scores are both extant and able to be interpreted by modern scholars and musicians. Approximately fifty of her hymns are extant and twenty-three are included in the Orthodox Church liturgical books. The exact number is difficult to assess, as many hymns are ascribed to different authors in different manuscripts and are often identified as anonymous. She was born between 805 and 810 in Constantinople into an wealthy family and grew to be exceptionally beautiful and intelligent. After rejecting the hand of the Emperor, Kassia became a nun at a convent in Xerolophos, Constantinople’s seventh hill. There she became a prolific poet and composer. Of the hundreds of hymn composers from the Eastern Church, only four women can be positively identified and only one of these – Kassia -- had her works incorporated into official service books for use in church worship. She also wrote secular works.