Book of Kells, illuminated gospel book (MS. A.I. 6; Trinity College Library, Dublin) that is a masterpiece of the ornate Hiberno-Saxon style. It is probable that the illumination was begun in the late 8th century at the Irish monastery on the Scottish island of Iona and that after a Viking raid the book was taken to the monastery of Kells in County Meath, where it may have been completed in the early 9th century. A facsimile was published in 1974.