LEWISTON — It’s a big weekend for classical music at Bates Concert Nov. 12-13, as the Bates and Bowdoin Orchestra and pianist Frank Glazer present back-to-back concerts in the Olin Arts Center Concert Hall, 75 Russell St.

The orchestra, which will be conducted at Bates by Hiroya Miura and includes musicians from Bates and Bowdoin colleges, plays works by Bartok, Haydn and Mendelssohn at 7:30 p.m. Saturday, Nov. 12.

Glazer performs music by Berg, Beethoven, Brahms and Liszt at 3 p.m. Sunday, Nov. 13, in the concert hall.

Both concerts are open to the public at no cost, but tickets are required. Please contact 786-6135 or olinarts@bates.edu.

The orchestra program consists of Bartok’s “Romanian Folk Dances”; Haydn’s Symphony No. 99 in E-flat major; and Mendelssohn’s Symphony No. 4 (“Italian”). The ensemble also performs this program at 3 p.m. the following day at Bowdoin’s Studzinski Recital Hall, Kanbar Auditorium, conducted by Bowdoin’s Roland Vazquez.

The 96-year-old Glazer, an internationally acclaimed pianist, has been an artist in residence at Bates since 1980. Here’s his program:

Berg’s Piano Sonata, Op. 1; Beethoven’s 15 Variations and Fugue in E Flat Major, Op. 35 (“Eroica” Variations); Brahms’s Theme and Variations (from String Sextet in B Flat Major, Op. 18), and the Scherzo in E Flat Minor, Op. 4; and by Liszt, “Legende No. 1: Saint Francis Preaching to the Birds”; “Années de Pélerinage: Sonetta 104 del Petrarcha”; and the “Rigoletto” Paraphrase.