Opelo in F sharp minor, is an Orthodox Requiem, written for the memorial service for Vuk Stefanovic Karadzic (1787 - 1864), a Serbian linguist. If examined closely, Mokranjac's work in church music far outweighs his achievements in secular music. One only needs to look at Mokranjac's biography to see that his work in church music is more plentiful and consumed more of his time than did his secular work. In parallel to the greatness of the tenth Song Wreath and the Goatherd, and to the Fifteenth, Fourteenth, and Eleventh Song Wreaths are some of his achievements in church music: Heruvika (the Cherubic hymn), Tebje odjejuscago (Joseph with Nicodemus took Thee down from the Tree), Opelo (the Orthodox equivalent to Requiem), and the Third, First and Second Stasis.