This striking Irish definitive series from 1971 features the stylized Celtic Dog, inspired by medieval designs from the Book of Kells. Each stamp presents the intricate zoomorphic pattern in a bold color—green (2p), red (1½p), brown (2½p), and violet (4p)—symbolizing Ireland’s artistic heritage and national identity. The design embodies the revival of Celtic art within Irish philately, merging ancient symbolism with modern simplicity. These issues were widely circulated and remain a cornerstone of Ireland’s early decimal definitive series.