The Prince of Wales has met Irish Taoiseach Enda Kenny on the final day of his tour of the Republic of Ireland.
Charles and the Taoiseach held a private meeting in Government Buildings.
As the Prince signed his name in the visitors' book, he joked: "This is just to prove I can write."
Mr Kenny showed Charles the signatures of his mother and father, Queen Elizabeth and Prince Philip.
They signed the book during their historic visit to Ireland in 2011.
Earlier, Charles and the Duchess of Cornwall took part in a ceremony at a 1916 Easter Rising memorial in Glasnevin Cemetery in Dublin.
The future king laid a wreath at the Necrology Wall, which bears the names of all those who died in the rebellion, Irish and British, military, police and civilian.
During a tour of the cemetery, the royal couple visited the graves of Michael Collins and Eamon de Valera, major figures in Irish nationalism.
They also took part in a ceremony at a war memorial, the Cross of Sacrifice, where paving stones were unveiled in memory of four Irish-born soldiers - Corporal John Cunningham, Company Sergeant Major Robert Hill Hanna, Lieutenant Frederick Maurice Watson Harvey and Private Michael James O'Rourke.
The soldiers were awarded the Victoria Cross in 1917.
Charles paused at the paving stone of Cpl Cunningham after he unveiled the memorial stone.
The Duchess bowed her head as she unveiled the paving stone in memory of Sgt Maj Hill Hanna.
Charles and Irish arts minister Heather Humphreys then laid wreaths at the Cross of Sacrifice.