In 1975, Pink Floyd bought a three-storey group of church halls at 35 Britannia Row in Islington and began converting them into a recording studio and storage space. In 1976, they recorded their tenth album, "Animals", in their newly finished 24-track studio. The album concept originated with Waters, loosely based on George Orwell's political fable "Animal Farm". The lyrics describe different classes of society as dogs, pigs, and sheep. Hipgnosis received credit for the packaging; however, Waters designed the final concept, choosing an image of the ageing Battersea Power Station, over which they superimposed an image of a pig.