(ANSA) - BELGRADE, 15 OTT - Slovenian President Nataša Pirc Musar will host the first-ever Arraiolos meeting of heads of state with non-executive powers in Slovenia on Thursday and Friday, according to Slovenian news agency STA. A dozen presidents will arrive in Slovenia to discuss Europe's future and international role.The presidents of Austria, Estonia, Greece, Ireland, Italy, Latvia, Hungary, Malta, Germany, Poland, Portugal, and Slovakia have confirmed their attendance at the informal Arraiolos group meeting, according to the presidential office. Bulgaria, Finland, and Croatia are also members of the group, but their leaders excused themselves due to other obligations, STA reported. The president's office said also that Croatian President Zoran Milanović will not attend due to the internal political situation, but Pirc Musar and Milanović will meet in Croatia's Istria next month. (ANSA).