Good album cover design became an important part of record production during the 1960s and early ’70s; prior to that the cover of an album usually just had a picture of the group or band. As with other areas, the Beatles were pioneers, with their covers for Revolver and Sergeant Pepper. Bob Dylan, the Rolling Stones and other artists of the time also spent time and money on creating the perfect album cover. Some albums’ covers became iconic, despite not even having the name of the band or album on the front, notably Pink Floyd’s Dark Side of the Moon, and King Crimson’s In The Court Of the Crimson King. The progressive rock group Yes became known for their elaborate and creative album covers during the 1970s. Today, streaming music and MP3s have meant that designing the perfect album cover isn’t as important as it once was.