Celtic art is associated with the people known as Celts, those who spoke the Celtic languages in Europe from pre-history through to the modern period, as well as the art of ancient peoples whose language is uncertain, but have cultural and stylistic similarities with speakers of Celtic languages. The Celts excelled in metal work and stone work and when the Christians arrived in old Hibernia (Ireland) and Scotland the birth of the Celtic Cross with its ornate patterns which are to be seen in The Book of Kells of The Book of Ballymote