Most composed settings of a liturgical text stay in the concert hall even when a church tradition admires them, performed by choirs but never formally adopted into the service itself. Mokranjac's Divine Liturgy of St. John Chrysostom crossed that line. It is officially recognized today as part of the actual service in the Serbian Orthodox Church, not merely as a widely performed choral work that happens to set a liturgical text, which places it in a fairly small category of nineteenth century compositions that moved from the concert stage into standing use at the altar rather than staying on one side of that divide.
That achievement sits inside a larger reputation. Mokranjac is called, without much argument from Serbian musicologists, the father of Serbian art music and the central figure of the country's musical romanticism, and his broader work transcribing and harmonizing traditional Serbian chant, of which this Liturgy is the most performed single result, is treated as the foundation nearly all modern Serbian church singing still stands on. A composer who set out to modernize how his church's chant sounded ended up, in this one case, changing what the church itself sings during its central weekly service, a rarer outcome than the ambition behind it might suggest.