Vienna

=== International organizations in Vienna===
[[File:Vereinte Nationen in Wien.jpg|thumb|UN complex in Vienna, with the Austria Center Vienna in front, taken from the [[Donauturm|Danube Tower]] in the nearby Donaupark before the extensive building work]]Vienna is the seat of a number of United Nations offices and various international institutions and companies, including the [[International Atomic Energy Agency]] (IAEA), the [[United Nations Industrial Development Organization]] (UNIDO), the [[UNODC|United Nations Office on Drugs and Crime]] (UNODC), the [[OPEC|Organization of Petroleum Exporting Countries]] (OPEC), the [[OFID|OPEC Fund for International Development]] (OFID), the [[Comprehensive Nuclear-Test-Ban Treaty Organization|Preparatory Commission for the Comprehensive Nuclear-Test-Ban Treaty Organization]] (CTBTO), the [[Organization for Security and Co-operation in Europe]] (OSCE), the [[United Nations Office for Outer Space Affairs]] (UNOOSA) and the [[European Union Agency for Fundamental Rights]] (FRA). Vienna is the world's third "UN city", next to New York City, [[Geneva]], and [[Nairobi]]. Additionally, Vienna is the seat of the [[United Nations Commission on International Trade Law]]'s secretariat ([[United Nations Commission on International Trade Law|UNCITRAL]]). In conjunction, the [[University of Vienna]] annually hosts the prestigious [[Willem C. Vis Moot]], an international commercial arbitration competition for students of law from around the world.

Diplomatic meetings were often held in Vienna in the latter half of the 20th century, resulting in multiple documents bearing the name [[Vienna Convention (disambiguation)|Vienna Convention]] or Vienna Document. Among the more important documents negotiated in Vienna are the 1969 [[Vienna Convention on the Law of Treaties]], as well as the 1990 [[Treaty on Conventional Armed Forces in Europe]]. Vienna also hosted the negotiations leading to the 2015 [[Joint Comprehensive Plan of Action]] on Iran's nuclear program as well as the [[Vienna peace talks for Syria]].