Lucy Worsley's Nights at the Opera

Very recommendable!

Part 1: 

Claudio Monteverdi: L'incoronazione di Poppea (the oldest opera still performed). Giuseppe Verdi: Nabucco (Chorus of the Hebrew Slaves, "Va, pensiero, sull'ali dorate" / "Fly, thought, on golden wings")

Ludwig von Beethoven: Fidelio (Beethoven's only opera)

Part 2

1. Puccini: La Boheme
2. Wagner: Die Walküre
3. Strauss: Salome

Lucy Worsley's Nights at the Opera Part 02 - YouTube