For the CGI compositions of the Vale of Arryn in the TV series, as seen in the establishing shot of the Eyrie and from the sky cells, the visual effects team used images and textures from the Greek rock formations of Meteora. Initially they had been considering the Zhangjiajie Mountains in China, but because the landscape base plates were shot in Northern Ireland, using Meteora resulted a better option. Set designer Gemma Jackson said, "A lot of the mosaics in the Eyrie were based on a beautiful chapel I visited in Rome." The interior of the High Hall of the Arryns was filmed at The Paint Hall, occupying one of the four soundstages there. Martin acknowledged that the set differed significantly from its presentation in the books: "In the books, the room is long and rectangular. But Paint Hall soundstage had essentially a square space, which they chose to put a round hall in, with a staircase curving up to a throne that was high above."