In 1999, Iwan and Manuela Wirth and Ursula Hauser opened the Hauser & Wirth Collection to the public, based in a former locomotive shed or roundhouse, called the "Lokremise", near St Gallen's main train station.
In 2000, Iwan Wirth and David Zwirner opened Zwirner & Wirth on 69th Street in New York, with the exhibition "Early Paintings" by Gerhard Richter.