The original melody is likely a variant of a medieval Gregorian chant ... At the mention of ringing bells in the lyrics, the Choir, Orchestra, and Gabriel Trumpet Ensemble are joined by the ...

Outside of the University, Mahrt directed St. Ann Choir, a Gregorian choir at St. Thomas Aquinas Church in Palo Alto. Mahrt enjoyed traveling to teach Gregorian chant and its relationship to the ...

and by visiting choirs when the Abbey Choir is in recess. The music sung ranges from Gregorian chant dating from the first millennium to contemporary music and encompasses the remarkable richness and ...