Mentioned by Triptipedia
9 of the Best Free Museums in Dublin
"Lonely Planet has described The Chester Beatty Library as the best in Europe, and it is easy to see why. Located on the grounds of Dublin Castle, this popular museum houses an amazing collection of 20,000 manuscripts, rare books, miniature paintings, clay tablets, costumes, and other historical and aesthetically-important artifacts. The Sacred Traditions gallery at the Chester Beatty."