 The Library began with the founding of Trinity College in 1592.In 1661, Henry Jones presented it with the Book of Kells, its most famous manuscript.James Ussher (1625–56), Archbishop of Armagh, whose most important works were ""Veterum Epistolarum Hibernicarum Sylloge"" (1632) and ""Brittanicarum Ecclesiarum Antiquitates"" (1639), left his valuable library, comprising several thousand printed books and manuscripts, to the Library.