Ronnie James Dio performing with Elf in August 1974
Dio (second from left) photographed backstage with his band Rainbow in 1978. Dio first gained prominence in the '70s with the metal troupe, which also featured Deep Purple guitarist Ritchie Blackmore.
Dio (center, on-stage in England in June, 1980) replaced Ozzy Osbourne in Black Sabbath and went on to cut the influential metal album Heaven and Hell with Sabbath members Geezer Butler (left) and Tony Iommi (right).
Dio in Los Angeles, 1983.
In 1982, Ronnie James (far left) and Sabbath drummer Vinny Appice (second from left) formed Dio with Jimmy Bain (second from right) and Viv Campbell.
Ronnie James Dio (photographed in 1986) often claimed credit for inventing metal's chief hand gesture: the devil horns.
Dio performing in Germany in August, 2004
Dio performing in Munich, Germany on May 30, 2006.
Ronnie James Dio (center) with Slash (left) and Terry Bozzio at the Hollywood RockWalk induction ceremony on January 17, 2007.
Dio backstage in Sunrise, Florida on September 24, 2007.
Dio performing with Heaven and Hell in Rochester Hills, Michigan on August 21, 2009.