In 1989, a picnic was held on the border between Austria and Hungary, as a demonstration for peace and European integration.
It prefigured the end of the Cold War and the Soviet Union and finished with hundreds of East Germans escaping to the West through the Iron Curtain.
In 2011, Rob Walker spoke to one of the organisers, Walburga Habsburg Douglas.
(Picture: A leaflet from the Pan European picnic. Credit: Getty Images)
