Thomas Bürgisser is a historian at the Diplomatic Documents of Switzerland (Dodis) research centre.
For decades, the communist regime in East Germany made great efforts to establish closer relations with Switzerland. Three weeks after a GDR prime minister visited Bern for the first time, the East German state ceased to exist.
When Václav Havel made a state visit to Switzerland in 1990, it was a minor sensation. Diplomatic documents shed light on the event from a variety of perspectives.