Celtic design is as ubiquitous as it is mysterious. Celtic knots are tattooed on biceps and shoulder blades; Celtic crosses have been adopted as sports teams' logos and are the inspiration for the symbol of the popular band Flogging Molly. Celtic design is found throughout the ancient era, from the Byzantine Empire to the Roman. Its history includes the mythical and much revered Saint Patrick and the majestic ships of the Vikings. In Celtic Pattern , author and artist Adam Tetlow makes accessible the complexities of Celtic design. He answers the myriad of questions surrounding the style: How do you draw Celtic knot work? What are the secrets of keys? What do these patterns actually mean? Who drew them? Where did they come from? In a book as beautifully designed as it is original, and full of illustrations by the author and rare engravings, Tetlow shows us the hidden principles behind the ancient magical science of Celtic artwork.