The Univ. of Dublin, or Trinity College (founded 1591), has in its library the famous Book of Kells and a copy of every book published in the British Isles. University College (Roman Catholic) was incorporated in 1909 as part of the National Univ. of Ireland. Dublin Castle (c.1220 but much altered since) was the residence of the lords lieutenants of Ireland until 1922 and now houses government facilities and the Charles Beatty Library. Another important library is the National Library of Ireland, founded in 1877. The city's earliest church, Christ Church, was founded in 1038; in 1172 Strongbow built a new church (restored 1871–78) on this site, and his tomb is there. St. Patrick's is the national cathedral of the Protestant Church of Ireland; Jonathan Swift, buried there, was dean from 1713 to 1745. Kilmainham Hospital, a notable structure that is no longer a hospital, dates from 1679. The General Post Office (1818) is important primarily as a key site in the Easter Uprising (1916); nearby is the 394-ft (120-m) Spire of Dublin (2003). Dublin has a national museum, noted for its collection of Irish antiquities, and the National Gallery of Art, which has a good collection of old masters.