Manuscript ; the complete manuscript would have contained around 110 folios. Decoration is limited to the initial letter of each Psalm. Each initial is created from a thick black line that is larger than the main text and decorated with trumpet, spiral and
guilloche patterns. They are often outlined with orange dots, and have areas of the lettering coloured white,
madder, pink and orange tinges. The art historian
Françoise Henry described the initial as "an essential landmark in the history of insular illumination", and speculated that the now lost front page "would have been invaluable for our knowledge of Irish illumination". The initials are followed by a series of letters that gradually diminish in size before merging with the main text. Irish manuscripts were typically written in localized scripts. The Cathach written for the most part by a single scribe who used a
book hand of round lettering and strong Latin or wedge-
serifs on the upright strokes. According to the historian and
calligraphier Timothy O'Neill, the scribe employed an edged rather than pointed quill, which he held at a flat angle "to produce thick downstrokes and thin horizontals". similar to that made for the 9th century
Breac Maodhóg. The shrine underwent three main phases of construction. The initial work was completed between 1062 and 1098 at
Kells, County Meath while the manuscript was in the possession of the O'Donnells and was their chief
relic. A new main face in gilt
repoussé was added between 1350 and 1375 with a large seated
Christ in Majesty flanked on the right by a Crucifixion scene, and by a saint (likely Columba) on the left. Further embellishments and repair works were carried out in the 16th century,
Side panels The long and short side panels contain inserts and mounts of different phases. The long sides mainly consist of traditional animal ornaments and abstract designs. The dominant mounts on the short sides contain more sophisticated patterns influenced by the
Ringerike style of
Viking art. Written in Irish and placed clockwise along the borders of the reverse of back of the shrine (beginning at top-left), they are signed by its goldsmith, Sitric Mc Meic Aeda (Sitric, son of Meic Aeda), who records that he built the shrine under the instruction of Domnall Mac Robartaigh (an abbot at Kells who had retired before his death in 1094, but is described in the inscription as "successor of Kells”), who in turn was under the commission and payment of Cathbarr Ua Domnaill. Nothing is known of Sitric outside of a record that his father worked as a craftsman at Kells. Given the number of misspellings and lack of consistency in the script, it has been suggested that Sitric was illiterate and was simply transcribed a script given to him. ==See also==