 The opening of the Iron Curtain between Austria and Hungary at the Pan-European Picnic on August 19, 1989 then set in motion a chain reaction, at the end of which there was no longer an East Germany and the Eastern Bloc had disintegrated.Extensive advertising for the planned picnic was made by posters and flyers among the GDR holidaymakers in Hungary.The Austrian branch of the Paneuropean Union, which was then headed by Karl von Habsburg, distributed thousands of brochures inviting them to a picnic near the border at Sopron.