John of Damascus (Иоанн Дамаскин) is a poem by Aleksey Konstantinovich Tolstoy, first published in the January, No.1, 1859 issue of Russkaya Beseda magazine. Fragments of the poem have been put to music by several composers, among them Pyotr Tchaikovsky, Sergei Taneyev and Vasily Kalinnikov. Source: Wikipedia (en)