The Pan-European Picnic itself developed further from a meeting between Otto von Habsburg and Ferenc Mészáros in June 1989. The local organisation in Sopron took over the Hungarian Democratic Forum, and the other contacts were made via Habsburg and the Hungarian Minister of State Imre Pozsgay.[9][10][11] The Austrian Paneuropean Union and the MDF took care of advertising the event with leaflets that were distributed in Hungary. The patrons of the picnic, Habsburg and Pozsgay, who were not present at the event, saw the planned event as an opportunity to test Mikhail Gorbachev's reaction to an opening of the border on the Iron Curtain.[12][13][14]
The official emblem of the picnic was a pigeon breaking through the barbed wire.[15] At the picnic several hundred East German citizens overran the old wooden gate, reaching Austria unhindered by the border guards around Árpád Bella. It was the largest mass exodus since the Berlin Wall was built in 1961. The Hungarian borders were opened on 11 September, and the Berlin Wall fell on 9 November. The Warsaw Pact disintegrated in 1991.[16][17][18][19]
^Hilde Szabo: Die Berliner Mauer begann im Burgenland zu bröckeln (The Berlin Wall began to crumble in Burgenland - German), in Wiener Zeitung 16 August 1999.
^Otmar Lahodynsky: Paneuropäisches Picknick: Die Generalprobe für den Mauerfall (Pan-European picnic: the dress rehearsal for the fall of the Berlin Wall - German), in: Profil 9 August 2014.
^Thomas Roser: DDR-Massenflucht: Ein Picknick hebt die Welt aus den Angeln (German - "Mass exodus of the GDR: A picnic clears the world") in: Die Presse 16 August 2018.
^"Der 19. August 1989 war ein Test für Gorbatschows" (German - 19 August 1989 was a test for Gorbachev), in: Frankfurter Allgemeine Zeitung 19 August 2009.
^Anat Kalman "Eine europäische Zukunft im Geiste Otto von Habsburg" In: Budapester Zeitung, 3 November 2019.