Between 1968 and 1982, Aubrey Powell and Storm Thorgerson designed almost 200 rock album covers under the name “Hipgnosis”. Only one of those would be recognised by as many as “The best album of all time”. It was launched in 1973 as Pink Floyd's 8th studio work, one of the most influential names of the Progressive Rock movement. Over a dark background, a beam of light is dispersed by a triangular prism that represents the band. Just as with light, the sound is apparently simple, yet wonderfully complex.