Does anyone know a certain piano song played in the movie "The Godfather"?

Question

This song is played in the scene where all the capos are upstairs after Michael leaves for Sicily, and the camera moves over to the man playing a piano tune, and the I'm really trying to find who exactly plays it and the name of it. Nino Rota did most of the songs for the soundtrack but its not on the soundtrack. Thank you.

Answer 1

"Passacaglia and Fugue in C minor"
by Johann Sebastian Bach