ORONO – Music director and conductor Xiao-Lu Li will lead the Bangor Symphony Orchestra through a world premiere, music by Mozart and more, at 3 p.m. Sunday, May 13, at the Maine Center for the Arts.

Considered his first real masterpiece and decidedly more ambitious than his other symphonies, Mozart’s Symphony no. 25 was composed when he was only 17.

The afternoon of music includes a world premiere, “Bangor Overture,” by a frequent cellist in the Bangor Symphony who has great admiration for his BSO colleagues, composer Richard Francis from Damariscotta.

Lydia Kilian, 2006 BSO Maine High School Concerto Competition winner, is the guest soloist for the afternoon, performing her winning piece with the orchestra, Grieg’s Piano Concerto in A minor. Kilian, of Weeks Mills, has been a part of the University of Southern Maine’s Piano Institute, Bay Chamber Next Generation program and the International String Festival in Portland.

In the summer of 2006, she attended the Piano Academy at Indiana University. In 2005 she received honorable mention in the Ocey Downs competition and won the first place Elsie Bixler Prize from Bay Chamber. Kilian has been playing the piano for 12 years, and studying under the tutelage of Cheryl Tschanz of Colby College for the past eight years. Kilian has taught privately and plans to further her studies in music, majoring in piano performance.

The afternoon concludes with one of Shostakovich’s most frequently performed pieces, Symphony no. 9. Written in the summer of 1945, months after the defeat of Nazi Germany, it was expected to be a Victory Symphony.

Shostakovich himself said of the Ninth, “It is a merry little piece. Musicians will love to play it, and critics will delight in blasting it.”

Advance tickets range from $13 to $38, with senior and youth discounts available, and can be reserved online at bangorsymphony.com or by calling 942-5555. More information is available at www.bangorsymphony.com.