Unto Ages of Ages features the North American recorded premiere of Georgy Sviridov's Ineffable Mystery. In his memory, the choir sang this set of pieces in Moscow and the Golden Ring on their third tour of Russia in 1998. Georgy Sviridov, who was one of Shostakovich's favorite students, wrote the music for Moscow's leading television news program and became one of the leading composers during the Soviet regime. Gloriae Dei Cantores, having already recorded "the best anthology of Russian music" (American Record Guide for Sacred Songs of Russia), now adds this rich collection of Russian sacred music to their discography. Also included are excerpts from Tchaikovsky's Liturgy of St. John Chrysostom and Rachmaninoff's All-Night Vigil. Unto Ages of Ages