Trinity College Library Dublin is the library of Trinity College and the University of Dublin. It is the largest library in Ireland and, as a legal deposit or "copyright library", it has rights to receive material published in the Republic of Ireland free of charge; it is also the only Irish library to hold such rights for the United Kingdom. The Library is the permanent home to the famous Book of Kells. Two of the four volumes are on public display, one opened to a major decorated page and the other to a typical page of text. The volumes and pages shown are regularly changed.