- Trinity College Library Dublin TCD Home Library Home Library Local Site Map Trinity College Library College Street Dublin 2 Tel (+353 1) 677 2941 Fax (+353 1) 671 9003 Welcome to the Library ! The Library of Trinity College is the largest research library in Ireland. In addition to the purchases and donations of almost four centuries, the Library is privileged in having the right to legal ...www.tcd.ie/Library