King George V (1865–1936), king of Great Britain since 1910, with his queen-consort Queen Mary (1867–1953), at Collier Hospital on a visit to Dublin. (Photo by Topical Press Agency/Getty Images)

King George V and Queen Mary walking in the grounds of Maynooth College (St Patrick's College) in Maynooth, County Kildare, during a visit to Ireland, July 1911. From left to right, His Grace, the Most Reverend Dr. Daniel Mannix (President of the College), the King, His Eminence Cardinal Michael Logue, Primate of All Ireland, the Queen, and His Grace, the Most Reverend Dr. William Walsh, Archbishop of Dublin. (Photo by Topical Press Agency/Hulton Archive/Getty Images)

Locals attend a review in Phoenix Park, Dublin, during a visit to Ireland by King George V and Queen Mary, July 1911. (Photo by Topical Press Agency/Hulton Archive/Getty Images)

King George V inspects cadets at Trinity College in Dublin, during a visit to Ireland, July 1911. (Photo by Topical Press Agency/Hulton Archive/Getty Images)

King George V and Queen Mary arrive at Kingstown, later Dun Laoghaire near Dublin, during a visit to Ireland, July 1911. They are accompanied by the Prince of Wales (later Edward VIII) and Mary, the Princess Royal. (Photo by Topical Press Agency/Hulton Archive/Getty Images)

Prince Arthur, Duke of Connaught and Strathearn (1850–1942) arrives at Kingstown, later Dun Laoghaire near Dublin, during a visit to Ireland, July 1911. (Photo by Topical Press Agency/Hulton Archive/Getty Images)

King George V and Queen Mary leave St Patrick's Cathedral in Dublin, during a visit to Ireland, July 1911. They are accompanied by the Prince of Wales (later Edward VIII) and Mary, the Princess Royal. (Photo by Topical Press Agency/Hulton Archive/Getty Images)

King George V and Queen Mary outside Trinity College in Dublin, during a visit to Ireland, July 1911. (Photo by Topical Press Agency/Hulton Archive/Getty Images)

King George V and Queen Mary visit Leopardstown racecourse in Dublin, during a visit to Ireland, July 1911. (Photo by Topical Press Agency/Hulton Archive/Getty Images)

Queen Elizabeth II and Prince Philip, Duke of Edinburgh arrive at Baldonnel Airport on May 17, 2011 in Dublin, Ireland. The Queen's visit, accompanied by The Duke of Edinburgh, is the first by a monarch since 1911. An unprecedented security operation is taking place with much of the centre of Dublin turning into a car free zone. Republican dissident groups have made it clear they are intent on disrupting proceedings. (Photo by Tim Rooke-Pool/Getty Images)

Queen Elizabeth II inspects the Guard of Honour at the Aras an Uachtarain, the official residence of the President of Ireland, on May 17, 2011 in Dublin, Ireland. (Photo by Oli Scarff/Getty Images)

Queen Elizabeth II lays a wreath at the Garden of Remembrance on May 17, 2011 in Dublin, Ireland. (Photo by Irish Government - Pool/Getty Images)

Security measures on a hilltop oversees the arrival of the Royal Flight containing Queen Elizabeth II and Prince Philip, Duke of Edinburgh at Baldonnel Airport on May 17, 2011 in Dublin, Ireland. The Queen's visit, accompanied by The Duke of Edinburgh, is the first by a monarch since 1911. An unprecedented security operation is taking place with much of the centre of Dublin turning into a car free zone. Republican dissident groups have made it clear they are intent on disrupting proceedings. (Photo by Chris Jackson-Pool/Getty Images)

Security keep an eye out as Queen Elizabeth II arrives to lay a wreath at Dublin Memorial Garden on May 17, 2011 in Dublin, Ireland. (Photo by Chris Jackson/Getty Images)

Irish police close roads as protesters demonstrate in the streets adjacent to the Garden on Remembrance where Queen Elizabeth II laid a wreath on May 17, 2011 in Dublin, Ireland. (Photo by Oli Scarff/Getty Images)

Protesters demonstrate in the streets adjacent to the Garden on Remembrance where Queen Elizabeth II laid a wreath on May 17, 2011 in Dublin, Ireland. (Photo by Oli Scarff/Getty Images)