On 1 August 1975, with the process of détente gradually thawing the chill that the Cold War had cast over international relations, the Heads of State or Government of 35 nations gathered in Helsinki to sign the Final Act of the Conference on Security and Co-operation in Europe (CSCE).
In the coming decades, the CSCE would evolve from a diplomatic Conference that helped to break down the barriers of mistrust between East and West into an international Organization - the OSCE - whose numerous institutions and field operations proved vital to stability in the post-Cold War world.
This timeline traces the growth of the OSCE from its origins in Helsinki into an organization with truly global reach that is actively engaged in conflict prevention, resolution and post-conflict rehabilitation - as well as a whole host of other activities related to security, co-operation, human rights and more.