"We must become the continuers of his work and realise his principles and values and take his legacy further," Samaras said.
Referring to Karamanlis's work, he stressed that "he was a man of western culture who was not led away on third-world paths.
"He was the architect of the multifaceted foreign policy that built bridges in East and West. He knew the country's limits and did not play communication games.
He always had the national interest as a compass, he had a vision for the country and looked ahead. He realized that the country's position is in Europe when others were shouting slogans.
He embraced all the parties, he legalized them but did not cease to criticize their mistakes. He did not attempt to pose as a pseudo-progressive. He was really progressive and ahead of his time. He was a good captain because he led with a firm hand.
He was a leader because he embraced them all. In his first period he had growth as a priority, in the second he had the consolidation of democracy. He disdained the pseudo-cultural makings and detested populism. He combined elements from the Atlantism of (late German chancellor Konrad) Adenauer and (late French president Charles) de Gaulle, he clashed on some occasions, but he never isolated the country. He restored and laid the foundations of parliamentarism. He was the Doric and strict leader who however shed tears for Macedonia."
Establishing correlations with the present, Samaras said that "the more bold reforms we make, the more openings we make to the international environment."
"The more we respect his legacy. We honor his legacy when we keep Greece in Europe when some thought we were finished, when we implement the law, when we try to achieve our targets for fiscal adjustment, when others only respect it with words".
The event was also attended by President of the Republic Karolos Papoulias, Archbishop of Athens and All Greece Ieronymos, Parliament President Evangelos Meimarakis, main opposition SYRIZA party leader Alexis Tsipras, the leaders of the government coalition parties Evangelos Venizelos and Fotis Kouvelis, former president Kostis Stephanopoulos, former prime ministers Constantine Mitsotakis, Costas Simitis, Costas Karamanlis accompanied hy his wife, George Papandreou and Panayiotis Pikrammenos.
"He succeeded in overcoming the asphyxiating limits that the civil war and the foreign protectors had imposed on both the country and his party. The status of the separation of the Greeks into nationalists and not. The practices of prosecutions, police unaccountability and the state of siege that characterised Greece until 1974. Heightening of course, with the seven-year dictatorship," the main opposition leader said.
Venizelos underlined that Constantine Karamanlis, "who had the rare privilege to cover, as a political leader, a period of around fifty years, has nothing to fear from this historical evaluation in process.
"Although there will always be questions and doubts over this or that of his options, the difficulties that he had to face both during the first phase and the second phase of his premiership, as well as his adherence to Europe and fiscal discipline are now better understood," Venizelos added.
"The legacy left behind by the leader of the liberal party in the country's political realm is enormous: What Constantine Karamanlis believed in and practiced for 60 years was his clear-cut views, a fine political culture, respect for other politicians' positions and that politics must be in the service of the general good," Democratic Left (DIMAR) party leader Fotis Kouvelis told the audience in an event to commemorate the 15 years since the death of the late Greek statesman Constantine Karamanlis, founder of the New Democracy liberal party and president of the Greek Republic.