A hymn is a song of praise, adoration, or a prayer directed usually to some religiously significant figure. In Orthodox Christianity, the subject matter for hymns in addition to God includes the Blessed Virgin Mary and the saints. Writers of hymns are known under a number of terms: hymnographer, hymnist, and hymnodist.
The concept of songs of praise, or hymns, was known from the Old Testament era, particularly the Psalms, as well as in the pagan world. The word hymn comes from the Greek hymnos through the Latin hymnus. In Orthodox Christian practice hymns may first have appeared as songs of praise primarily to God and later were extended to praise of saints as well as of God through his saints.
Among the most noted Orthodox Christian composers of hymns are St. Joseph the Hymnographer, St. Kassiani the Hymnographer, St. Romanos the Hymnographer, and St. Ephrem the Syrian. There are many others who have composed hymns, including to modern times.