Gigon and Guyer established Annette Gigon / Mike Guyer Architects in 1989. As of 2011, the practice consisted of the two founding partners, an office manager, seven team leaders, and about 50 co-workers. It wins the majority of its commissions by taking 1st Prize in open or invited competitions. Gigon/Guyer established its reputation in the 1990s through its work on houses and museums, notably the Kirchner Museum in Davos, devoted to the art of
Ernst Ludwig Kirchner, and Museum Liner in Appenzell. In 1998 it won 1st Prize in a competition for the design of the archaeological Museum and Park Kalkreise in
Osnabrück, Germany, near the site of the ancient
Battle of the Teutoburg Forest. It is noticeable that the firm soonly attracted international attention after its museum designs, such as the already mentioned Kirchner Museum in Davos, the Museum Extension in Winterthur, Kunstmuseum Appenzell, or the Archaeological Museum and Park in Kalkriese near Osnabrück, Germany. The other museum (the Swiss Museum of Transport in Lucerne) has later expanded the list. Since 2000, the practice has expanded its range to include residential development projects (many of which have won the "Good Architecture" awards of the municipalities in which they are located) and office buildings. Recently, Gigon/Guyer have completed several important projects in
Zürich West, a former industrial district. They include
Prime Tower, Switzerland’s tallest building from 2011 to 2015, and a new office complex on Lagerstrasse, a collaborative project with
Max Dudler and
David Chipperfield. In the same district, they have designed a residential tower, office building, and two contemporary art museums as additions to Löwenbräu Areal, a former brewery and listed industrial landmark. ==Characteristics==