An octet of professional singers will perform Vivaldi’s “Gloria” on Friday, Dec. 19, at 7 p.m. at St. Mary’s Catholic Church, 304 W. San Antonio St.

The singers will be joined by the Fredericksburg Community Orchestras, under the direction of Theresa Britt.

Britt is a professional violinist, fiddler, guitarist, vocalist, composer and songwriter who shares her music around the world. She has directed the Fredericksburg Community Orchestras since 2010.

The choral work will be accompanied by...