Today, as we mourn Ozzy's passing, we should remember that Black Sabbath's legacy extends far beyond their game-changing sound. They also established the principle that heavy music required equally heavy visuals, and proved that album art could be as transgressive as the music itself.

Heavy metal legend Ozzy Osbourne dies at 76. The Grammy-winning Prince of Darkness long struggled with addiction, finally achieving sobriety in 2014.

Fellow legends of heavy metal along with stars of music, film and TV are honouring the British rocker following his death aged 76