Wolfgang Amadeus Mozart

Wolfgang Amadeus Mozart remains one of the most talented and prolific composers of the classical period. 
This above video from biography.com gives a simple yet interesting summary of his life.

Symphony No. 40 in g minor KV550
Boston Symphony Orchestra, 
conducted by Leonard Bernstein

"Queen of the Night Aria" 
from The Magic Flute (opera)
Natalie Dessay

Piano Quartet in g minor KV478
Allegro (1st Movement)
Fauré Quartett

Violin Concerto No. 3 in G Major K216
George Enescu Festival
and Hilary Hahn, violin (composed her own cadenzas)