The Taoiseach, Mr Ahern, had a meeting with President Mandela of South Africa yesterday after the conclusion of the summit. They discussed Northern Ireland and South Africa's relations with the EU.
Mr Ahern said he was impressed with Mr Mandela's grasp of detail on the Belfast Agreement and he invited him to visit Ireland in the near future.
Mr Mandela won many hearts and minds in Cardiff. As the deputy leader of the county council put it, in proposing that he be made a freeman of the city, "We are interested in the summit and proud to be the host, but we are inspired by your visit."
The Western Mail carried the headline, "Nelson steals the show".
There was a colourful ceremony in the grounds of Cardiff Castle. An enthusiastic crowd of onlookers, many of them veterans of the anti-apartheid struggle, participated, along with politicians, massed choirs and groups of children.
Another speaker described him as "the most outstanding figure of the 20th century and a symbol of hope in the new world order". Mr Mandela went on to have lunch with the summit leaders.
Mr Ahern told President Mandela: "The example of the South African experience was of great value to many of the parties in the Northern Ireland peace process, and this was frequently mentioned in the talks sessions. We in Ireland greatly appreciate your goodwill and encouragement."
He hoped Mr Mandela could visit Ireland before he retired, perhaps in the autumn.
They discussed policing, human rights and equality issues, the Rev Ian Paisley's attitude towards the new assembly and its likely composition, and North-South bodies.
Mr Ahern acknowledged how South African visitors had been very helpful, especially in leading Sinn Fein on in the peace process.
From the Irish point of view, "if ever there was a man who was prepared to move on from the past into reconciliation and building trust and confidence, he's the man. And it's still very much his view that a comprehensive and inclusive process is required."
Mr Ahern expects that the EU agreement with South Africa can be completed in the autumn.
Mr Mandela emphasised the need to build up a special relationship between Europe and southern Africa based on mutual confidence and co-operation rather than handouts.