Political and economic relations between Iran and the European Union have improved considerably following the successful conclusion of the nuclear deal between Iran and the major international powers.
Armenian president Serzh Sargsyan is in Nagorno-Karabakh where he is due to participate in celebrations marking the 25th anniversary of the declaration of independence by the self-declared Nagorno-Karabakh Republic.
Many foreign ministers will be attending the meeting "reflecting the importance of the OSCE as a platform for dialogue, with a view to promoting peace in Europe and our common security from Vancouver to Vladivostok"