The exhibition celebrates the band's reunion with Ozzy Osbourne for latest album 13, which topped charts across the world. Classic Rock said of the band's 19th studio outing: "13 isn't as good as their first six albums � what is? � but it's a million times better than most of what followed, and way more than you could ever expect from a three men of pensionable age who proved all they had to prove 40 years ago."