What song is Allie playing in The Notebook?

Question

In The Notebook Allie plays the piano right before they are about to (almost) make love and then again when she is an old woman ...the part where Noah is getting a check up by a Doc and the Doc makes a comment about them turning the page and Noah says no she's playing that by memory! Can any one tell me what the name of that piece?

Answer 1

Chopin's Prelude