ZT Fachmessen AG is an owner-managed, independent family business in the third generation and one of the largest private trade fair organizers in Switzerland. In 1956 Elsa and Otto Kölliker-Schaffner founded their own exhibition center in Spreitenbach. They laid the foundation for a success story and called the company “Zürich-Tor”. Ruth and Hans Biland-Schaffner took over the management of the Zurich-Tor AG in 1969. Later, the name was changed to ZT Fachmessen AG.