Designed by Antonio Bonet, Juan Kurchan & Jorge Ferrari-Hardoy For its 80th anniversary Knoll pays tribute to design originality, creating a special edition of the Butterfly chair. The year 1938 was a very fertile one for design history: among many developments, the Knoll company was founded, and a very special chair was designed, which Hans Knoll decided to include in the firm’s catalogue from 1947 to 1951, meeting with remarkable success.