On our second visit to Dublin, my list of things I wanted to see included the Book of Kells. This is located in the Old Library at Trinity College and I think it goes without saying that photography is not allowed anywhere near the books.
The Book of Kells was created in the 9th century and is housed in a 18th century building. The Book of Kells is part of an exhibit entitled "Turning Darkness into Light". The Book is on display in the Treasury along with other manuscripts. After you view these manuscripts you head to the Long Room where other very interesting books are in glass cases and bookcases.
The Book of Kells is gorgeous. It is illuminated and the colors are still amazingly bright and vivid. It is all over in just a few minutes but take the time to see it, you won't regret it.