The Ave Maria University Chamber Choir will sing William Byrd's great Mass for 4 Voices at a Solemn High Mass in the Extraordinary Form. This Mass, part of the Musica Sacra Florida Sacred Gregorian Chant Conference at AMU,  will be celebrated by Monsignor Andrew Wadsworth at 7 p.m., Friday, Feb. 15, in The Oratory. All are welcome.

Propers of the Mass will be sung by the Women's Schola Gregoriana under the direction of AMU Professor of Music Dr. Susan Treacy. The conference is open to everyone.