National Cathedral of St. Patrick of the Anglican Church, erected near the source of St. Patrick's, is the largest in Ireland. The first mention of the cathedral dates back to 1191. In 1560, one of the first clocks in Dublin was installed on the cathedral tower. From 1783 to 1871, the cathedral served as the chapel of the Order of Knighthood of St. Patrick, and solemn knighting ceremonies were held there. The cathedral was built on an island between the branches of the Poddle River and the area around it is periodically subjected to flooding, so there are no basements in the cathedral. Every November, Remembrance Day is celebrated here, at which the President of Ireland is present. The council is headed not by a bishop, but by a dean. For more than 30 years, the famous writer Jonathan Swift, who is now buried here, was the dean of St. Patrick's Cathedral.