Discuss as:

Queen Elizabeth II begins her 20th trip to Northern Ireland

Cathal Mcnaughton / Reuters

Britain's Queen Elizabeth waves to members of the public as she arrives in Enniskillen on the first day of a two day tour of Northern Ireland, June 26.

David Moir / Reuters

People take photographs from a rooftop as Britain's Queen Elizabeth and Prince Philip arrive for a service of thanksgiving at Saint Macartin's Cathedral in Enniskillen, Northern Ireland June 26.

David Moir / Reuters

Britain's Queen Elizabeth accepts flowers from members of the public after she attended a Service of Thanksgiving at Saint Macartin's Cathedral in Ennniskillen, Northern Ireland June 26.

Chris Jackson / Getty Images

Queen Elizabeth II visits Macartin's Cathederal on June 26, in Enniskillen, Northern Ireland.

Carl Court / AFP - Getty Images

After more than five decades on the throne, view images from the extraordinary life of Queen Elizabeth II.

AP reports: ENNISKILLEN, Northern Ireland - Queen Elizabeth II arrived in Northern Ireland on Tuesday to celebrate the British territory's hard-won peace in a town that suffered one of the IRA's worst massacres - and inspired its greatest moment of Christian forgiveness.

Catholic and Protestant leaders from across Ireland united in Enniskillen at an ecumenical service in the monarch's honor as, outside in wind and rain, several thousand people waved Union Jack flags and banners honoring the queen amid an unrelenting din of pealing church bells.

The monarch's long-awaited meeting with former Irish Republican Army commander Martin McGuinness comes Wednesday in Belfast. Full story

See more photos from the Queen's life in our slideshow at right.

The Queen is making a historic visit to Northern Ireland as part of her Diamond Jubilee tour. She arrived in Enniskillen, the scene of one of the worst atrocities of The Troubles, and meet the Stormont deputy first minister, former IRA commander Martin McGuinness, in a gesture which will herald another milestone in Anglo-Irish relations. ITN's Martha Fairlie reports.