One of Dublin's unmissable attractions, the Book of Kells Library is home to a huge gallery located at Trinity College in the heart of the city. The Book of Kells, a ninth century manuscript documenting the four gospels of the life of Jesus Christ, is the greatest cultural wealth in the world. Ireland, and one of the world's most famous medieval manuscripts. The gallery also provides access to one of the most beautiful libraries in the world, which holds 200,000 of the oldest books at Trinity College.