That is very pretty. As far as recommendations, I wpuld be hard pressed to give you just one piece. Classical has so many styles, from Baroque to even prior, Medieval,, or Romantic period, or......Oh, golly,
Ok start with Beethoven's violin Concerto, Joshua Bell does an ok rendition, you might you tube him. Though there are so many, in the Baroque period, you might try one of Handels many Sonatas or any violin piece by Mozart for some later stuff. But the styles are so different, it's all a matter of taste.....
Understand that classical music has been around since just after Gregorian chants (around 650 AD) through such modernistic 20th Century works like the Appalacian Spring Suite. Each period is stylistically very different.
We really need a separate thread for this, I wish not to hijack the thread.....
Yes, try Beethoven's Violin Concerto, let me know what you think......