Classic, maybe you've heard

Toccata and Fugue in D minor - Johann Sebastian Bach

In The Hall of the Mountain King - Edvard Grieg

Les Toreadors from Carmen - Georges Bizet(Guitar Duet)

Turkish March - Wolfgang Amadeus Mozart

Rondo Alla Turca (Turkish March) - Mozart(Solo Guitar)

Rondo alla Turca - W. A. Mozart(Guitar duet)

Minuet in G - J.S Bach