In attendance were Parliament Speaker Vladimir Seks, Prime Minister Ivo Sanader, relevant ministers and Zagreb Mayor Milan Bandic.
The summit of presidents of central European countries will for the first time be held in Zagreb, and is scheduled for 13-15 October.
The 12th summit will pool 17 presidents who will discuss the completion of the process of European integration and appropriate economic and social models for the united Europe, according to a press release issued by the Office of the Croatian President.
This will be the greatest gathering of heads of state in Croatia since the Zagreb summit in November 2000 which pooled EU officials and heads of state and government of South-East European countries.