Pittsburgh Mandolin Orchestra, based in McCandless Township, will perform its Christmas concert. The country's largest mandolin orchestra will be performing traditional American and international holiday tunes, as well as a suite from "The Nutcracker". Ajvar Tamburitza Orchestar, vocalists Gary Burdick and Benjamin Rosner, and Riversong String Ensemble will also be showcased. The PghMO is conducted by Master Folk Musician, Charley Rappaport. Doors open at 4:00pm. Tickets will be available at the door for $7 regular admission, $5 for seniors, and free for children under 12.