 Led Zeppelin's next album, Houses of the Holy, was released in March 1973. It featured further experimentation by the band, who expanded their use of synthesisers and mellotron orchestration. The predominantly orange album cover, designed by the London-based design group Hipgnosis, depicts images of nude children climbing the Giant's Causeway in Northern Ireland. Although the children are not shown from the front, the cover was controversial at the time of the album's release. As with the band's fourth album, neither their name nor the album title was printed on the sleeve.
