Top 10 Deep Purple Ballads and Power Ballads

My favorite version is the live rendition from California 1974. There are also some great cover versions - Dio/Rainbow, Yngwie, Jorn.

Opeth did a cover.

It's over 12 min long, and has progressive and symphonic arrangements. This beautiful piece was released in 1969 and it's mostly instrumental.

Metallica did a very good cover.

The song sample is a live version recorded circa 2000 but it's a very good version.