Trinity College

Founded in 1592 by Elizabeth I, Trinity College, in Dublin is Ireland's oldest university. During its early life, Trinity was a university exclusively for the Protestant ascendency class. Roman Catholics were first admitted in 1793. In 1873 all religious tests were abolished. Women were admitted to Trinity College for the first time in 1904.
The library in Trinity College is the largest research library in Ireland contains 4.25 million books, of which the Book of Kells, the library's most famous asset.

Source : [The Irish book of Lists, Julian Ashe]