I made Music of the Spheres by using a tile from the Alhambra Palace, Granada. I pierced a hole through the centre of the tile and then threaded them onto a ring, in the same way that I made Eternity. The sides of the tiles are 's' shaped, and number 7 of Hogarth's 'Lines of Grace', see Innocence. They are created by the arcs of 6 circles. I used these tiles also to create Prometheus' Hearth, and there is a full explanation of the tiles on that page, with drawings.