This large butterfly diptych was made specially for The d’Offay Donation. A diptych of two pieces of wood or metal containing the names of the living and the dead has been used, so that prayers and Masses can be said for their souls. Hirst has long been obsessed with butterflies as a metaphor for mortality. They are traditional symbols of the soul. In 1991 Hirst filled a London gallery with hundreds of live tropical butterflies, some of them growing from chrysalises on monochrome canvasses hung from the wall.