Soli Deo Gloria with Orchestra Gloria performs a concert of Baroque choral music that will leave the audience guessing. Find out who really wrote these pieces and why it's been kept a secret for years as artistic director Allen H Simon conducts this first-ever "whodunnit" concert.

"Everybody thought we knew who wrote these beautiful pieces, but it turns out we were mistaken," Simon said.

Some are just accidental; others outright frauds. For example:

What motivated J.B. Weckerlin to write a fake piece in the 1800s and claim it was by Orlando di Lasso?

Why did the respected Bach-Gesellschaft think that Kuhnau's cantata "Uns ist ein Kind geboren" was by Bach?

Who really wrote the Pergolesi Magnificat?

Should we tell children that their favorite Bach song "Bist du bei mir" was actually composed by Gottfried Stölzel?

Find out which pieces fooled publishers (and sometimes scholars) for years at 3:30 p.m., Sunday, March 14, at Christ Episcopal Church, 1700 Santa Cruz Ave. Tickets are $25: $20 for students and seniors at the door; discount for advance purchase. Call 888-SDG-SONG or order online at www.sdgloria.org.