After gaining independence, the Netherlands established a diplomatic representation in Bern in 1814, which was transformed into a consulate general in 1832. A year later, Switzerland opened a consulate in Amsterdam, and a further consular representation was set up in Rotterdam in 1847. In 1894 the Netherlands opened a legation in Bern.
In 1904 the Federal Council decided to accredit its envoy in London to the Dutch government, and in 1917 Switzerland established a legation in The Hague. In 1957 both the Netherlands and Switzerland upgraded their legations to embassies.
During the Second World War, Switzerland took on protecting power mandates for the Netherlands in China (official) and in Bulgaria and France (de facto). In 1993 Queen Beatrix made a state visit to Switzerland. In 2004 Joseph Deiss, the then President of the Swiss Confederation, was invited on a state visit to The Hague.
Switzerland is represented in the Netherlands by its embassy in The Hague, and honorary representations (consulates) in Amsterdam, Rotterdam and Willemstad (Curaçao). The Netherlands, for its part, has an embassy in Bern and honorary consulates general in Zurich, Basel, Lugano, as well as in Liechtenstein.
Netherlands, Historical Dictionary of Switzerland (de, fr, it)