Cosmas of Maiuma was an eighth-century bishop and influential hymnographer born in Jerusalem. Raised alongside his foster-brother, John of Damascus, he lived during the Byzantine era and served as a monk in a monastery near the Holy City. He later transitioned from monastic life to the episcopacy when he was appointed to lead the port of Maiuma. Throughout his life, he was a significant figure in defending the Church against iconoclasm and contributed extensively to the development of liturgical music.