The Republic of Ireland's leader Enda Kenny laid a laurel wreath for the war dead on Remembrance Sunday in Enniskillen.
The Fine Gael leader and head of the government attended a solemn ceremony at the memorial in the town – where the IRA killed 11 people in a Poppy Day bomb in 1987.
World leaders gathered there earlier this year for the G8 economic summit, but yesterday was about commemoration and reflection, and Mr Kenny stood for a moment with his head bowed.
Enniskillen was marking the 26th anniversary of the no-warning blast. Relatives of the victims of the IRA attack also laid tributes.
The Taoiseach said he had been moved by meeting relatives of the Enniskillen dead and those injured by the blast.
"It was something that made an impact on me when I came here," Mr Kenny said.
"I think it was appreciated by the groups that I met."
He said the continuing impact of atrocities such as Enniskillen demonstrated the need to deal with the consequences of the past and the importance of encouraging reconciliation.
"It says we should continue to work together to bring a sense of understanding and justice to those victims of the atrocious bomb in Enniskillen and in a broader sense to define what it means for the victims of terrorism right across the board," he added.
Those who died in the attack were all Protestant and they included three married couples, a reserve police officer and several pensioners. Ex-headmaster Ronnie Hill died 13 years after being injured in the attack.
The youngest victim was 20-year-old nurse Marie Wilson whose father, Gordon Wilson, subsequently gave a moving interview in which he said he had prayed for those behind the attack.
Mr Kenny made history last year by becoming the first Irish premier to attend a Remembrance Day service in Northern Ireland.
Northern Ireland Secretary Theresa Villiers laid a poppy wreath at the Co Fermanagh memorial, which was rebuilt after the bomb, as did local Stormont Assembly members Arlene Foster and Tom Elliott.