This book is a new translation of the Antiphonary of Bangor into contemporary liturgical English. The Antiphonary of Bangor is a book of canticles and prayers that were used in Bangor Abbey's liturgies of the hours with special prayers and elements for Easter Eve, Easter Day, Eastertide, Saturdays and Sundays and on festivals of Martyrs. It was written by hand, sometime around A. D. 680. It is significant for two main reasons. It shows us a worship tradition that developed in a different way than the Roman Rite. While some of the canticles, hymns and prayers in the Antiphonary are also found in the Roman Rite, many are unique. It also shows us some of the theology of the Celtic Christians.