This concerto was dedicated to the Hungarian violin virtuoso, Zoltán Székely, who requested the composition in 1936, and is a prime example of verbunkos style.
Bartók initially planned to write a single-movement set of variations, but Székely wanted a standard three-movement concerto. In the end, Székely got his three movements and Bartók got his variations (the second movement being possibly the most formal set of variations Bartók wrote in his career, and the third movement being a variation on material from the first).
Bartok Violin Concerto No.2 Sz.112 BB 117 for Violin and Orchestra
It has the following three movements:
1. Allegro non troppo
2. Andante tranquillo
3. Allegro molto