The origins of the cathedral are related to the construction in 445 of a stone church on the Druim Saileach hill by St. Patrick, around which a monastic community developed. The church was historically the centre of the Roman Catholic Church in Ireland. The cathedral and its assets were appropriated by the state church, called the Church of Ireland, as part of the Protestant Reformation in Ireland. The English government under King Henry VIII of England transferred the assets. It has remained in Anglican hands since the reign of Queen Elizabeth I of England. A Roman Catholic cathedral, also called St Patrick's Cathedral, was built on a neighbouring hill in the nineteenth century. Cordial relations exist between both cathedral chapters. The church itself has been destroyed and rebuilt 17 times. The edifice was renovated and restored under Dean Eoghan McCawell at the start of the sixteenth century having suffered from a devastating fire in 1511 and being in poor shape. Soon after his death the cathedral was described by Lord Chancellor Cusack as ‘one of the fairest and best churches in Ireland’. Again it was substantially restored between 1834 and 1840 by Archbishop Lord John George Beresford and the architect Lewis Nockalls Cottingham. The fabric remains that of the mediaeval building but much restored. While Cottingham was heavy-handed in his restoration, the researches of T. G. F. Patterson and Janet Myles in the late twentieth century have shown the restoration to have been notably antiquarian for its time. The tracery of the nave windows in particular are careful restorations as is the copy of the font. The capital decoration of the two western most pillars of the nave are mediaeval as are the bulk of the external gargoyle carvings of the parapet of the Eastern Arm. Cottingham's intention of retaining the richly-cusped West Door with flanking canopied niches was over-ruled. Subsequent restorations have more radically altered the internal proportions of the mediaeval building, proportions which Cottingham had retained. Many other Celtic and mediaeval carvings are to be seen within the cathedral which is also rich in eighteenth- and nineteenth-century sculpture. There are works by Francis Leggatt Chantrey, Louis-François Roubiliac, John Michael Rysbrack, Carlo Marochetti and others. The Choral Foundation, dating from the Culdees, and refounded as the Royal College of King Charles of Vicars Choral and Organist in the cathedral of Armagh, continues to the present. There are generally a dozen Gentlemen of the Lay Vicars Choral and sixteen boy choristers. The Maundy Money was distrusted at the cathedral in 2008: a plaque in the south aisle commemorates this event.
