From somewhere round the year 800 a.d.,the Book of Kells, a masterpiece of western art, is the most recognized and most remarkable artifact of medieval Celtic art. It features page after page of lavish, colorful lettering, illumination, decoration and illustration. To a large extent, the great reputation which Celtic art and design have today is based on the exceptional quality of the images found in the Book of Kells.
this site displays and translates the meaning of 5 of its folios. just click on the folio of choice to view each detailed translation of the incredible artwork. My favourite is number 5,the 'chi-rho' (XPI)page.
they are trying to sell you something on the site, but are giving you free and valuable art and info.
this other site has thumbnails of some of the art: http://www.snake.net/people/paul/kells/thumbnails