* It is one of the few violin concertos written in a minor key. Most violin concertos are written in a major key, which gives them a brighter, more cheerful sound. The E minor concerto is darker and more introspective, which gives it a unique character.
* The concerto is in one continuous movement. Most violin concertos are in three movements, but the E minor concerto is in one long, continuous movement. This makes the concerto more cohesive and gives it a sense of urgency.
* The concerto features a prominent role for the viola. The viola is often used as a supporting instrument in orchestral music, but in the E minor concerto it is given a more prominent role. The viola plays several important solos and duets with the violin, and it helps to create a rich, textured sound.
The violin concerto in E minor is a unique and challenging work that is sure to please listeners of all levels. It is a testament to Mendelssohn's genius as a composer and his ability to create beautiful and innovative music.