Before the early 1990s war, the 20-storey building housed the Bosnian Executive Council. It was heavily damaged by Serb troops during the war and the Greek government invested 13.5 million euros in its reconstruction.
This building is a symbol of war and sorrow transformed into a monument to peace and friendship, Karamanlis said at the opening.
Asked by the press to comment on earlier claims in the Bosnian print media that Greek volunteers had participated in the war in Bosnia on the Serb side and committed crimes, Karamanlis dismissed such information, saying that Greece had always been friendly towards all peoples in Bosnia.
Karamanlis also met the three members of the state Presidency - Zeljko Komsic, Haris Silajdzic and Nebojsa Radmanovic - who thanked Greece for its assistance to Bosnia and Herzegovina, notably for its support to have the Regional Cooperation Council secretariat based in Sarajevo.
Karamanlis said Greece felt sorry over the events in Srebrenica in 1995, when Serb troops killed more than 8,000 Muslims. He announced Greece would donate money for the reconstruction of a school in Srebrenica and that his country was ready to help in police reform and constitutional changes in Bosnia and Herzegovina.
A delegation of the Greek government and Bosnia's Council of Ministers signed two agreements, on the avoidance of double taxation and on cooperation in the economy and technology.