From Piernè to Beethoven
The movie contains a segment that features characters from greek mythology.
The classical music piece to go with it was originally Cydalise by composer Gabriel Piernè.
But Walt Disney thought it was too expressive for what he was getting at, so they opted for Beethoven's Pastoral Symphony.

YOU ARE READING
Top 20 Fantasia facts
FanfictionThere's more to Disney's third movie than meets the eye.