Dublin is spread over the broad valley of the River Liffey in a great sweep of coast from the rocky brow of Howth in the north to the headland of Dalkey in the south, and sheltered by the Wicklow Hills. In addition to its imposing public buildings, Dublin is particularly rich in 18th century architecture with fine Georgian mansions, wide streets and spacious squares. There are fashionable shopping centres as well as a range of cultural and sporting entertainment. There are many public parks in Dublin, the most famous of which is Phoenix Park at the western edge of the city. Housed in the west wing of Leinster House, The National Gallery has over 2000 paintings, while the National Museum has a collection of Irish antiquities from the Stone Age to medieval times. Other museums worth visiting include the Dublin Civic Museum, the Municipal Gallery of Modern Art, the National Library of Ireland and the Royal Irish Academy Library. Trinity College Library houses the 8th century Book of Kells and the finest collection of early illuminated manuscripts in Ireland. Founded by Elizabeth I in 1591, it is noted for its cobbled stone quadrangles and imposing grey college buildings. Dublin Castle, the seat of British administration from the 12th century tot eh 1920s, can be found on high ground west of Dame Street and Christ Church Cathedral, one of the city’s finest historical buildings, is located at the end of Lord Edward Street.