The Queen visits Ireland

Britain's Queen Elizabeth II speaks to fishmonger Pat O'Connell as she visits a market in Cork, on the last day of her four-day visit to Ireland, Friday, May 20.

Queen Elizabeth, left, and Prince Philip, second from left, arrive for their visit to St Patrick's Rock in Cashel on May 20. The trip was the first by a British monarch to Ireland since the country's independence.

Irish police officers stand guard as Queen Elizabeth and Prince Philip arrive at St Patrick's Rock on May 20.

The queen arrives by helicopter at the Rock of Cashel.

The queen receives a standing ovation from 2,000 guests at the National Convention Centre in Dublin on May 19.

The queen views a fashion show featuring outfits by British and Irish designers at the National Convention Centre in Dublin on May 19.

The queen arrives for her visit to the Irish National Stud in Kildare on May 19.

The queen looks at a stallion called Amadeus Wolf during a visit to the Irish National Stud on May 19.

Queen Elizabeth II with sculptor Anthony Scott, left, after unveiling a sculpture during a tour of the Irish National Stud in Kildare, on the third day of the Queen's four-day visit to Ireland, on May 19.

A Garda keeps watch as Queen Elizabeth visits the Irish National Stud on May 19, in Kildare, Ireland. An unprecedented security operation is taking place with much of the center of Dublin turning into a car free zone.

Queen Elizabeth and The Duke of Edinburgh arrive with Irish President Mary McAleese and her husband Dr. Martin McAleese for a State Dinner on the second day of her State Visit, at Dublin Castle, on May 18, in Dublin.

Police block a road to protestors during a demonstration over the visit by Britian's Queen Elizabeth in Dublin on May 18.

Queen Elizabeth enters Croke Park stadium with Ireland's President Mary McAleese, right, and Gaelic Athletic Association President Christy Cooney in Dublin on May 18. Queen Elizabeth undertook one of the most daring diplomatic engagements of her reign on Wednesday when she stepped out into Ireland's Croke Park stadium, scene of a massacre by British troops.

Britain's Queen Elizabeth II and The Duke of Edinburgh look at a pint of Guinness at the Guinness Storehouse in Dublin during a visit on Wednesday. Neither of them drank the offered pint.

Britain's Queen Elizabeth II and The Duke of Edinburgh, right, are shown the Dublin cityscape from the Gravity Bar at the Guinness Storehouse in Dublin, Wednesday.

A woman cleans the red carpet in advance of a visit by Queen Elizabeth II and Prince Philip, Duke of Edinburgh on Wednesday, May 18, in Dublin, Ireland. The Duke and Queen's visit to Ireland is the first by a monarch since 1911.

Queen Elizabeth II visits Government Buildings on Merrion Street on Wedneday in Dublin.

Queen Elizabeth II and Prince Philip's signatures in a guest book made during their visit to government buildings on Merrion Street May 18 in Dublin.

Britain's Queen Elizabeth and Prince Philip walk with the Ireland's deputy prime minister, Eamon Gilmore, on arrival at Baldonnel Aerodrome near Dublin on Tuesday, May 17. The queen's visit was the first by a British monarch since Ireland won independence from London in 1921. It's designed to show that the bitter enmity of Ireland's war of independence 90 years ago has been replaced by Anglo-Irish friendship.

Demonstrators clash with Irish police during a protest in Dublin on the first day of Queen Elizabeth II's visit. Protesters chanted slogans and torched the British flag.

A demonstrator is arrested by police during a protest in Dublin on the first day of the queen's four-day visit.

Queen Elizabeth attends a welcome ceremony at the residence of Irish President Mary McAleese in Dublin on Tuesday.

Queen ElizabethI and Irish President Mary McAleese lay a wreath in the Garden of Remembrance in Dublin on Tuesday.

Queen Elizabeth and Prince Philip with the provost of Trinity College Dublin, John Hegarty, and British Foreign Secretary William Hague. They are viewing the foundation charter of the college.

Queen Elizabeth visits Trinity College in Dublin.

Queen Elizabeth is greeted by well-wishers as she leaves Trinity College in Dublin.