What are the distinguishing features of Bach's Violin Concerto in A minor?

Bach's Violin Concerto in A minor is known for its intricate melodies, virtuosic violin passages, and rich harmonies. The concerto showcases a dialogue between the solo violin and the orchestra, with the violin often leading the musical conversation. Bach's use of counterpoint, where multiple melodic lines intertwine, is also a notable feature of this concerto.