Who created cover design for the Beatles album 'Revolver'?

Revolver is the seventh studio album by the English rock band the Beatles. Released on 5 August 1966, it was the Beatles' final recording project before their retirement as live performers and marked the group's most overt use of studio technology up to that time, building on the advances of their 1965 release Rubber Soul.

The cover for Revolver was created by German-born bassist and artist Klaus Voormann, one of the Beatles' oldest friends from their time in Hamburg during the early 1960s. Voormann's artwork was part line drawing and part collage, using photographs mostly taken over 1964–65 by Robert Freeman. In his line drawings of the four Beatles, Voormann drew inspiration from the work of the nineteenth-century illustrator Aubrey Beardsley, who was the subject of a long-running exhibition at London's Victoria and Albert Museum in 1966 and highly influential on fashion and design themes of the time. Voormann placed the various photos within the tangle of hair that connects the four faces. Turner writes that the drawings show each Beatle "in another state of consciousness", such that the older images appear to be tumbling out from them.