The most famous musical piece from The Da Vinci Code is Hans Zimmer's "Chevaliers de Sangreal," known for its powerful, building symphonic theme. Another notable selection is the haunting, choral-style "Kyrie for the Magdalene" by Richard Harvey.
You can find piano arrangements of "Chevaliers de Sangreal" on Tomplay and "Kyrie for the Magdalene" on Sheet Music Digital . Da Vinci Code Soundtrack | Chevaliers de Sangreal