Uriah Heep is an English rock band formed in London in 1969 and are regarded as one of the seminal hard rock acts of the early 1970s. Uriah Heep's progressive/art rock/heavy metal fusion's distinctive features have always included a massive keyboard sound, strong vocal harmonies and (in the early years) David Byron's quasi-operatic vocals. Twelve of the band's albums have made it to the UK Albums Chart (Return to Fantasy reached No. 7 in 1975) while of the fifteen Billboard 200 Uriah Heep albums Demons and Wizards was the most successful (#23, 1972). In the late 1970s the band had massive success in Germany, where the "Lady in Black" single was a big hit. Along with Black Sabbath, Deep Purple and Led Zeppelin, Uriah Heep had become one of the top bands in the early 1970s - one of "The Big 4" of Hard Rock.